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Ex vivo lung perfusion: The makings of a game changer.

Trasplante cardíaco - Lun, 04/03/2017 - 18:10
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Ex vivo lung perfusion: The makings of a game changer.

J Heart Lung Transplant. 2017 Mar 07;:

Authors: Awori Hayanga JW

PMID: 28363738 [PubMed - as supplied by publisher]

Categorías: Trasplante cardíaco

Supervised exercise training versus usual care in ambulatory patients with left ventricular assist devices: A systematic review.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Supervised exercise training versus usual care in ambulatory patients with left ventricular assist devices: A systematic review.

PLoS One. 2017;12(3):e0174323

Authors: Ganga HV, Leung A, Jantz J, Choudhary G, Stabile L, Levine DJ, Sharma SC, Wu WC

Abstract
Implantation of left ventricular assist devices (LVAD) has increased because of improved safety profile and limited availability of heart transplantation. Although supervised exercise training (ET) programs are known to improve exercise capacity and quality of life (QoL) in heart failure (HF) patients, similar data is inconclusive in LVAD patients. Thus, we performed a systematic review on studies that incorporated supervised ET and measured peak oxygen uptake in LVAD patients. A total of 150 patients in exercise and 55 patients in control groups were included from 8 studies selected from our predefined criteria. Our systematic review suggests supervised ET has an inconsistent effect on exercise capacity and QoL when compared to control groups undergoing usual care. A quantitative sub-analysis was performed with 4 studies that provided enough data to compare peak oxygen uptake and QoL at baseline and at follow-up. After at least 6 weeks of training, LVAD patients undergoing supervised ET demonstrated significant improvement in exercise capacity (standardized mean difference [SMD] = 0.735, 95% Confidence Interval-[CI], 0.31-1.15 units of the standard deviation, P = 0.001) and QoL scores (SMD = 1.58, 95% CI 0.97-2.20 units of the standard deviation, P <0.001) when compared to the usual care group, with no serious adverse events with exercise. These results suggest that supervised ET is safe and can improve patient outcomes in LVAD patients when compared to the usual care.

PMID: 28362876 [PubMed - in process]

Categorías: Trasplante cardíaco

New role of ventricular assist devices as bridge to transplantation: European perspective.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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New role of ventricular assist devices as bridge to transplantation: European perspective.

Curr Opin Organ Transplant. 2017 Mar 30;:

Authors: Reineke DC, Mohacsi PJ

Abstract
PURPOSE OF REVIEW: Progress of ventricular assist devices (VAD) technology led to improved survival and apparently low morbidity. However, from the European perspective, updated analysis of EUROMACS reveals a somewhat less impressive picture with respect to mortality and morbidity.
RECENT FINDINGS: We describe the great demand of cardiac allografts versus the lack of donors, which is larger in Europe than in the United States. Technical progress of VADs made it possible to work out a modern algorithm of bridge-to-transplant, which is tailored to the need of the particular patient. We analyze the burden of patients undergoing bridge-to-transplant therapy. They are condemned to an intermediate step, coupled with additional major surgery and potential adverse events during heart transplantation.
SUMMARY: Based on current registry data, we do have to question the increasingly popular opinion, that the concept of heart transplantation is futureless, which seems to be for someone who treats and compares both patients (VAD and heart transplantation) in daily practice, questionable. Up to now, left ventricular assist device therapy remains a bridge to a better future, which means a bridge to technical innovations or to overcome the dramatic lack of donors in Europe.

PMID: 28362668 [PubMed - as supplied by publisher]

Categorías: Trasplante cardíaco

Three-dimensional replica of corrected transposition of the great arteries for successful heart transplantation.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Three-dimensional replica of corrected transposition of the great arteries for successful heart transplantation.

J Artif Organs. 2017 Mar 30;:

Authors: Fujita T, Fukushima S, Fukushima N, Shiraishi I, Kobayashi J

Abstract
A 59-year-old man who had been previously diagnosed with congenitally corrected transposition of the great arteries at the age of 35 years became a candidate for heart transplantation. At the age of 57 years, he was referred to our hospital and underwent implantation of a left ventricular assist device (EVAHEART; Sun Medical Technology Research Corp., Suwa City, Japan) because of worsening ventricular function and was listed as a heart transplant candidate. A donor appeared when the patient was 59 years. A three-dimensional replica was made using data from computed tomography angiography. The three-dimensional replica was made of soft rubber (crossMedical, Inc., Kyoto, Japan), which enabled the surgeons to understand the relationship between the great arteries and chambers. After repeated dry laboratories using this replica, the patient underwent successful heart transplantation.

PMID: 28361206 [PubMed - as supplied by publisher]

Categorías: Trasplante cardíaco

Evaluation of Carotid Ultrasonography Screening Among Kidney Transplant Candidates: A Single-Center, Retrospective Study.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Evaluation of Carotid Ultrasonography Screening Among Kidney Transplant Candidates: A Single-Center, Retrospective Study.

Transplant Direct. 2017 Mar;3(3):e135

Authors: Rossitter CW, Vigo RB, Gaber AO, Swan JT, Suki WN

Abstract
BACKGROUND: Kidney transplant candidates undergo rigorous testing prior to clearance for transplantation. Because kidney transplant candidates may be at increased risk for carotid artery stenosis because of arteriosclerosis and atherosclerosis secondary to hypertension, vascular calcification, and diabetes, carotid ultrasound is often performed with the intent of preventing a cerebrovascular accident in the perioperative or posttransplant period. To our knowledge, there has not been a study investigating the utility of screening carotid ultrasonography in pretransplant candidates. The purpose of the present study was to investigate the yield of carotid ultrasonography in end-stage renal disease patients, at high risk for having clinically significant vascular disease evaluated at our center for kidney transplantation during the years 2009 to 2014.
METHODS: Data for carotid ultrasound findings and risk factors for carotid artery disease were extracted from the medical records.
RESULTS: A total of 882 patients were included in our study of which only 13 patients (1.47% of the cohort) had significant carotid artery stenosis (>70%) on ultrasound testing. Using multiple logistic regression on the outcome of carotid stenosis, congestive heart failure (adjusted odds ratio, 5.2), and peripheral vascular disease (adjusted odds ratio, 4.4) were positively associated with carotid stenosis.
CONCLUSIONS: The prevalence of significant carotid artery stenosis was only 1.47% in our cohort of kidney transplant candidates, and the routine use of carotid ultrasound testing in this population may not be an efficient use of clinical resources. Use of risk factors, such as congestive heart failure or peripheral vascular disease, may identify patients who are more likely to benefit from carotid ultrasonography screening.

PMID: 28361119 [PubMed - in process]

Categorías: Trasplante cardíaco

Patterns of Care and Outcomes in Cardiovascular Disease After Kidney Transplantation in the United States.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Patterns of Care and Outcomes in Cardiovascular Disease After Kidney Transplantation in the United States.

Transplant Direct. 2017 Feb;3(2):e126

Authors: Mathur AK, Chang YH, Steidley DE, Heilman R, Khurmi N, Wasif N, Etzioni D, Moss AA

Abstract
BACKGROUND: Cardiovascular disease (CVD) is an important driver of mortality after kidney transplantation. Its broader impact on posttransplant health care utilization in US hospitals is unknown.
METHODS: We used administrative claims data from the Nationwide Inpatient Sample and the American Hospital Association Annual Survey to identify hospitalizations for kidney transplant patients with a cardiovascular diagnosis from 2005 to 2011. CVD hospitalizations were stratified by transplant hospital status to characterize patterns in inpatient health care utilization and outcomes. Based on these analyses, the domestic burden of treatment for posttransplant CVD (myocardial infarction, stroke, congestive heart failure, dysrhythmia, cardiac arrest, malignant hypertension) was estimated.
RESULTS: The total domestic burden of post-kidney transplant hospitalization between 2005 and 2011 is estimated at 389 138 of which 26.5% of episodes were related to CVD (n = 103 118). CVD was responsible for a growing proportion of post-transplant hospitalizations over time (24.4%-30.4%, P < 0.001). Compared with nontransplant hospitals, transplant hospitals had similar length of stay (median length of stay, 3.7 days), higher median costs per hospitalization (US $10 364 vs US $8606, overall US $9324), and lower adjusted mortality (3.2% vs 3.9%, overall 3.6%; P = 0.003).
CONCLUSIONS: Inpatient CVD care is increasing over time for kidney transplant patients, accounting for 30% of all post-transplant hospitalizations. Variation exists in the inpatient care, outcomes, and costs between by hospital type. Further studies are needed to better understand the mechanisms behind these phenomena.

PMID: 28361110 [PubMed - in process]

Categorías: Trasplante cardíaco

Predictive Role of Coagulation, Fibrinolytic, and Endothelial Markers in Patients with Atrial Fibrillation, Stroke, and Thromboembolism: A Meta-Analysis, Meta-Regression, and Systematic Review.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Predictive Role of Coagulation, Fibrinolytic, and Endothelial Markers in Patients with Atrial Fibrillation, Stroke, and Thromboembolism: A Meta-Analysis, Meta-Regression, and Systematic Review.

Med Sci Monit Basic Res. 2017 Mar 31;23:97-140

Authors: Weymann A, Sabashnikov A, Ali-Hasan-Al-Saegh S, Popov AF, Jalil Mirhosseini S, Baker WL, Lotfaliani M, Liu T, Dehghan H, Yavuz S, de Oliveira Sá MP, Jang JS, Zeriouh M, Meng L, D'Ascenzo F, Deshmukh AJ, Biondi-Zoccai G, Dohmen PM, Calkins H, Cardiac Surgery And Cardiology-Group Imcsc-Group IM

Abstract
BACKGROUND The pathophysiological mechanism associated with the higher prothrombotic tendency in atrial fibrillation (AF) is complex and multifactorial. However, the role of prothrombotic markers in AF remains inconclusive. MATERIAL AND METHODS We conducted a meta-analysis of observational studies evaluating the association of coagulation activation, fibrinolytic, and endothelial function with occurrence of AF and clinical adverse events. A comprehensive subgroup analysis and meta-regression was performed to explore potential sources of heterogeneity. RESULTS A literature search of major databases retrieved 1703 studies. After screening, a total of 71 studies were identified. Pooled analysis showed the association of coagulation markers (D-dimer (weighted mean difference (WMD) =197.67 and p<0.001), fibrinogen (WMD=0.43 and p<0.001), prothrombin fragment 1-2 (WMD=0.53 and p<0.001), antithrombin III (WMD=23.90 and p=0.004), thrombin-antithrombin (WMD=5.47 and p=0.004));  fibrinolytic markers (tissue-type plasminogen activator (t-PA) (WMD=2.13 and p<0.001), plasminogen activator inhibitor (WMD=11.44 and p<0.001), fibrinopeptide-A (WMD=4.13 and p=0.01)); and  endothelial markers (von Willebrand factor (WMD=27.01 and p<0.001) and soluble thrombomodulin (WMD=3.92 and p<0.001)) with AF. CONCLUSIONS The levels of coagulation, fibrinolytic, and endothelial markers have been reported to be significantly higher in AF patients than in SR patients.

PMID: 28360407 [PubMed - in process]

Categorías: Trasplante cardíaco

Myocardial Viability: Survival Mechanisms and Molecular Imaging Targets in Acute and Chronic Ischemia.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Myocardial Viability: Survival Mechanisms and Molecular Imaging Targets in Acute and Chronic Ischemia.

Circ Res. 2017 Mar 31;120(7):1197-1212

Authors: Gewirtz H, Dilsizian V

Abstract
Myocardial responses to acute ischemia/reperfusion and to chronic ischemic conditions have been studied extensively at all levels of organization. These include subcellular (eg, mitochondria in vitro); intact, large animal models (eg, swine with chronic coronary stenosis); as well as human subjects. Investigations in humans have used positron emission tomographic metabolic and myocardial blood flow measurements, assessment of gene expression and anatomic description of myocardium obtained at the time of coronary artery revascularization, ventricular assist device placement, or heart transplantation. A multitude of genetic, molecular, and metabolic pathways have been identified, which may promote either myocyte survival or death or, most interestingly, both. Many of these potential mediators in both acute ischemia/reperfusion and adaptations to chronic ischemic conditions involve the mitochondria, which play a central role in cellular energy production and homeostasis. The present review is focused on operative survival mechanisms and potential myocardial viability molecular imaging targets in acute and chronic ischemia, especially those which impact mitochondrial function.

PMID: 28360350 [PubMed - in process]

Categorías: Trasplante cardíaco

Clinical Progress in Cell Therapy for Single Ventricle Congenital Heart Disease.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Clinical Progress in Cell Therapy for Single Ventricle Congenital Heart Disease.

Circ Res. 2017 Mar 31;120(7):1060-1062

Authors: Bittle GJ, Wehman B, Karathanasis SK, Kaushal S

PMID: 28360342 [PubMed - in process]

Categorías: Trasplante cardíaco

Dual Function for Mature Vascular Smooth Muscle Cells During Arteriovenous Fistula Remodeling.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Dual Function for Mature Vascular Smooth Muscle Cells During Arteriovenous Fistula Remodeling.

J Am Heart Assoc. 2017 Mar 30;6(4):

Authors: Zhao J, Jourd'heuil FL, Xue M, Conti D, Lopez-Soler RI, Ginnan R, Asif A, Singer HA, Jourd'heuil D, Long X

Abstract
BACKGROUND: The arteriovenous fistula (AVF) is the preferred form of hemodialysis access for patients with chronic kidney disease. However, AVFs are associated with significant problems including high incidence of both early and late failures, usually attributed to inadequate venous arterialization and neointimal hyperplasia, respectively. Understanding the cellular basis of venous remodeling in the setting of AVF could provide targets for improving AVF patency rates.
METHODS AND RESULTS: A novel vascular smooth muscle cell (VSMC) lineage tracing reporter mouse, Myh11-Cre/ERT2-mTmG, was used to track mature VSMCs in a clinically relevant AVF mouse model created by a jugular vein branch end to carotid artery side anastomosis. Prior to AVF surgery, differentiated medial layer VSMCs were labeled with membrane green fluorescent protein (GFP) following tamoxifen induction. Four weeks after AVF surgery, we observed medial VSMC layer thickening in the middle region of the arterialized vein branch. This thickened medial VSMC layer was solely composed of differentiated VSMCs that were GFP+/MYH11+/Ki67-. Extensive neointimal hyperplasia occurred in the AVF region proximal to the anastomosis site. Dedifferentiated VSMCs (GFP+/MYH11-) were a major cellular component of the neointima. Examination of failed human AVF samples revealed that the processes of VSMC phenotypic modulation and intimal hyperplasia, as well as medial VSMC layer thickening, also occurred in human AVFs.
CONCLUSIONS: We demonstrated a dual function for mature VSMCs in AVF remodeling, with differentiated VSMCs contributing to medial wall thickening towards venous maturation and dedifferentiated VSMCs contributing to neointimal hyperplasia. These results provide valuable insights into the mechanisms underlying venous adaptations during AVF remodeling.

PMID: 28360226 [PubMed - in process]

Categorías: Trasplante cardíaco

Bilateral Lung Transplantation for Bleomycin-Associated Lung Injury.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Bilateral Lung Transplantation for Bleomycin-Associated Lung Injury.

Oncologist. 2017 Mar 30;:

Authors: Narayan V, Deshpande C, Bermudez CA, Golato JM, Lee JC, Diamond J, Vaughn DJ

Abstract
This report details the successful use of bilateral lung transplantation for the management of severe postoperative bleomycin-associated lung injury. This case highlights that the extremely favorable prognosis of advanced testicular germ cell tumors after systemic chemotherapy (>90% cure rate) should not preclude lung transplant consideration in all cases, despite current guidance that considers an advanced malignancy to be a contraindication for lung transplant listing. The Oncologist 2017;22:1-3.

PMID: 28360217 [PubMed - as supplied by publisher]

Categorías: Trasplante cardíaco

The Benefit of Donor-Recipient Matching for Patients Undergoing Heart Transplantation.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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The Benefit of Donor-Recipient Matching for Patients Undergoing Heart Transplantation.

J Am Coll Cardiol. 2017 Apr 04;69(13):1707-1714

Authors: Nguyen VP, Mahr C, Mokadam NA, Pal J, Smith JW, Dardas TF

Abstract
BACKGROUND: Heart transplant volumes are not matching growing demand, and donor heart use may be decreasing.
OBJECTIVES: This study sought to investigate the benefit of heart transplantation compared with waiting while accounting for the estimated risk of a given donor-recipient match.
METHODS: This study identified 28,548 heart transplant candidates in the Organ Procurement and Transplant Network between July 2006 and December 2015. Donor-recipient match quality was estimated from the donor risk index. A time-dependent covariate Cox model was used to determine the effect of donor-recipient match quality on the likelihood of a composite outcome while waiting for a transplant or after transplantation. The composite outcome was death or delisting as too ill.
RESULTS: Donor and recipient risk estimates were inversely related to the candidate urgency. Net benefit from heart transplantation was evident across all estimates of donor-recipient status 1A and 1B candidates: status 1A (lowest-risk quartile hazard ratio [HR]: 0.37; 95% confidence interval [CI]: 0.31 to 0.43; highest-risk quartile HR: 0.52; 95% CI: 0.44 to 0.61) and status 1B candidates (lowest-risk quartile HR: 0.41; 95% CI: 0.36 to 0.47; highest-risk quartile HR: 0.66; 95% CI: 0.58 to 0.74). Status 2 candidates showed a benefit from heart transplantation; however, survival benefit was delayed. For the highest-risk donor-recipient matches, a net benefit of transplantation occurred immediately for status 1A candidates, after 12 months for status 1B candidates, and after 3 years for status 2 candidates.
CONCLUSIONS: This study demonstrated a survival benefit of heart transplantation across all ranges of estimated donor-recipient match risk for status 1A and status 1B candidates. Donor heart acceptance should be the favored strategy for these candidates. The benefit of transplantation for status 2 candidates was less apparent and dependent on estimated donor-recipient match risk, suggesting that a measure of donor-recipient match quality may be useful when considering the immediate benefit of heart transplantation for status 2 candidates in stable condition.

PMID: 28359517 [PubMed - in process]

Categorías: Trasplante cardíaco

Pediatric Heart Transplantation With Lecompte Maneuver Owing to Extremely Oversized Donor Allograft.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Pediatric Heart Transplantation With Lecompte Maneuver Owing to Extremely Oversized Donor Allograft.

Ann Thorac Surg. 2017 Apr;103(4):e345-e347

Authors: González-López MT, Pérez-Caballero-Martínez R, Pita-Fernández AM, Gil-Jaurena JM

Abstract
The techniques and outcomes of heart transplantation in the pediatric population continue to improve over the years, although the supply of organs remains limited. Donor-to-recipient size matching is critical, especially in neonates and small infants. We present a novel strategy for heart transplantation that includes the Lecompte maneuver because of the features of the donor allograft available in a 8-month-old patient with a cardiac fibroma. We discuss the basis principles for extending the indication of this procedure to exceptional transplantation scenarios and describe the results at long-term follow-up.

PMID: 28359495 [PubMed - in process]

Categorías: Trasplante cardíaco

Twin-to-Twin Heart Transplantation: A Unique Event With a 25-Year Follow-Up.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Twin-to-Twin Heart Transplantation: A Unique Event With a 25-Year Follow-Up.

Ann Thorac Surg. 2017 Apr;103(4):e341-e342

Authors: Blitzer D, Yedlicka G, Manghelli J, Dentel J, Caldwell R, Brown JW

Abstract
Solid organ transplantation in pediatric patients has been a reality since 1954, when the first kidney transplantation was successfully performed between identical twins. We report the long-term outcomes, with more than 25 years of follow-up, in a patient born with hypoplastic left heart syndrome (HLHS) who received a heart transplant from a dizygotic twin. While we would not wish for this situation to reoccur, we hope that in reporting it, we can add to the discussion surrounding pediatric heart transplantation and the management of HLHS.

PMID: 28359493 [PubMed - in process]

Categorías: Trasplante cardíaco

Mismatch between the origin of premature ventricular complexes and the noncompacted myocardium in patients with noncompaction cardiomyopathy patients: involvement of the conduction system?

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Mismatch between the origin of premature ventricular complexes and the noncompacted myocardium in patients with noncompaction cardiomyopathy patients: involvement of the conduction system?

Ann Noninvasive Electrocardiol. 2017 Mar;22(2):

Authors: Van Malderen S, Wijchers S, Akca F, Caliskan K, Szili-Torok T

Abstract
BACKGROUND: Noncompaction cardiomyopathy (NCCM) is considered to be the result of an arrest in the normal myocardial embryogenesis. The histological, developmental, and electrophysiological explanation of ventricular arrhythmias in NCCM is still unknown. The aim of this study was to determine the origin of premature ventricular contractions (PVCs) in NCCM and to identify any predominant arrhythmic foci.
METHODS: Retrospective data from our NCCM registry including 101 patients were analyzed. A total number of 2069 electrocardiograms (ECGs) were studied to determine the origin of PVCs. Echocardiographic data were analyzed in patients with PVCs in all 12 leads. Segments affected by noncompaction (NC) were compared with the origin of PVCs.
RESULTS: PVCs were documented in 250 ECGs from 55 (54%) patients. Thirty-five ECGs recorded PVCs on all 12 leads and the origin of 20 types of PVCs could be determined. Ninety-five percent of PVCs did not originate from left ventricular NC myocardial areas and two PVCs (10%) had a true myocardial origin. All other PVCs originated from structures such as the outflow tracts (8/20), the fascicles (7/20), especially the posteromedial fascicle (6/20), and the mitral and tricuspid annulus (3/20).
CONCLUSIONS: Our data suggest that PVCs in NCCM mainly originate from the conduction system and related myocardium.

PMID: 27568851 [PubMed - indexed for MEDLINE]

Categorías: Trasplante cardíaco

Successful Re-Repeat Resection of Primary Left Atrial Sarcoma After Previous Tumor Resection and Cardiac Autotransplant Procedures.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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Successful Re-Repeat Resection of Primary Left Atrial Sarcoma After Previous Tumor Resection and Cardiac Autotransplant Procedures.

Ann Thorac Surg. 2016 Sep;102(3):e227-8

Authors: Hussain ST, Sepulveda E, Desai MY, Pettersson GB, Gillinov AM

Abstract
Primary cardiac sarcomas are rare but aggressive tumors and can present a technical challenge with regard to surgical approach and resection. Complete surgical resection, when feasible, remains crucial for palliation of symptoms and for its role as the mainstay of cardiac sarcoma therapy. Surgical resection of recurrent cardiac sarcomas, though formidable, is technically feasible and may provide reasonable survival, especially when the recurrence is local and the metastatic load is limited. In this case report, we describe a successful third cardiac sarcoma resection procedure in a young patient with previous cardiac autotransplantation and excision of left atrial sarcoma.

PMID: 27549550 [PubMed - indexed for MEDLINE]

Categorías: Trasplante cardíaco

First Successful Surgical Reconstruction of Bilateral Transected Main Bronchi With Extracorporeal Membrane Oxygenation Support.

Trasplante cardíaco - Sáb, 04/01/2017 - 16:36
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First Successful Surgical Reconstruction of Bilateral Transected Main Bronchi With Extracorporeal Membrane Oxygenation Support.

Ann Thorac Surg. 2016 Aug;102(2):e135-7

Authors: Biancosino C, Krüger M, Kühn C, Zinne N, Wilhelmi M, Zeckey C, Krettek C, Gathen M

Abstract
Complex tracheobronchial injuries, especially if both main bronchi are involved, are life threatening and their diagnosis and successful treatment concerning short-term as well as long-term results are most challenging. This is the first report on a successful reconstruction of a complex bilateral bronchial injury under extracorporeal membrane oxygenation (ECMO) support. We present the course from prehospital treatment, establishment of ECMO in the emergency room to initial bronchoscopy, operative reconstruction, and intensive care therapy. Under these special circumstances ECMO provided a stable respiratory situation not only preoperatively but also intraoperatively without aggravating a compensated bronchial situation under aggressive ventilation.

PMID: 27449449 [PubMed - indexed for MEDLINE]

Categorías: Trasplante cardíaco

Extracorporeal life support prior to left ventricular assist device implantation leads to improvement of the patients INTERMACS levels and outcome.

Trasplante cardíaco - Vie, 03/31/2017 - 15:17
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Extracorporeal life support prior to left ventricular assist device implantation leads to improvement of the patients INTERMACS levels and outcome.

PLoS One. 2017;12(3):e0174262

Authors: Schibilsky D, Haller C, Lange B, Schibilsky B, Haeberle H, Seizer P, Gawaz M, Rosenberger P, Walker T, Schlensak C

Abstract
BACKGROUND: The objective of this study was to evaluate the outcome of left ventricular assist device (LVAD) implantation after initial extracorporeal life support (ECLS) in patients with cardiogenic shock and the incidence of post implantation right ventricular failure.
METHODS & RESULTS: All patients on ECLS therapy for cardiogenic shock prior to LVAD implantation (n = 15) between October 2011 and January 2014 were analyzed. Baseline patient characteristics, as well as detailed pre-operative treatment and postoperative outcome data were collected retrospectively. At time of admission to our unit all patients were classified INTERMACS II or higher (12 [80%] INTERMACS I). Improvement to INTERMACS III temporary cardiac support (TCS) at time of LVAD implantation was successful in 14 patients (93.3%). End-organ function recovered during ECLS support. No patient needed ongoing ECLS or additional right ventricular support after LVAD implantation. Both in-hospital and 30-day mortality was 6.7% (n = 1). The median duration of LVAD support was 687.9 ± 374.5 days. At the end of the study (follow-up 810.7 +/- 338.9 days), 13 (86.7%) patients were alive. The majority of patients (10 [66.7%]) remained on LVAD support. Transplantation could be performed in 1 (6.7%) patient, 2 (13.3%) patients could be successfully weaned.
CONCLUSION: LVAD implantation in ECLS patients leads to improvement of INTERMACS level to INTERMACS III TCS status. Excellent mid-term survival comparable to true INTERMACS III-IV patients could be shown. ECLS prior to LVAD as a bridge-to-bridge therapy may help to lower mortality in primarily unstable patients.

PMID: 28358849 [PubMed - in process]

Categorías: Trasplante cardíaco

Tubular Cardiac Tissues Derived from Human Induced Pluripotent Stem Cells Generate Pulse Pressure In Vivo.

Trasplante cardíaco - Vie, 03/31/2017 - 15:17
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Tubular Cardiac Tissues Derived from Human Induced Pluripotent Stem Cells Generate Pulse Pressure In Vivo.

Sci Rep. 2017 Mar 30;7:45499

Authors: Seta H, Matsuura K, Sekine H, Yamazaki K, Shimizu T

Abstract
Human induced pluripotent stem (iPS) cell-derived cardiac cells provide the possibility to fabricate cardiac tissues for transplantation. However, it remains unclear human bioengineered cardiac tissues function as a functional pump in vivo. Human iPS cells induced to cardiomyocytes in suspension were cultured on temperature-responsive dishes to fabricate cardiac cell sheets. Two pairs of triple-layered sheets were transplanted to wrap around the inferior vena cava (IVC) of nude rats. At 4 weeks after transplantation, inner pressure changes in the IVC were synchronized with electrical activations of the graft. Under 80 pulses per minute electrical stimulation, the inner pressure changes at 8 weeks increased to 9.1 ± 3.2 mmHg, which were accompanied by increases in the baseline inner pressure of the IVC. Immunohistochemical analysis revealed that 0.5-mm-thick cardiac troponin T-positive cardiac tissues, which contained abundant human mitochondria, were clearly engrafted lamellar around the IVC and surrounded by von Willebrand factor-positive capillary vessels. The mRNA expression of several contractile proteins in cardiac tissues at 8 weeks in vivo was significantly upregulated compared with those at 4 weeks. We succeeded in generating pulse pressure by tubular human cardiac tissues in vivo. This technology might lead to the development of a bioengineered heart assist pump.

PMID: 28358136 [PubMed - in process]

Categorías: Trasplante cardíaco

Clinical features and predictors of patients with critical limb ischemia who responded to autologous mononuclear cell transplantation for therapeutic angiogenesis.

Trasplante cardíaco - Vie, 03/31/2017 - 15:17
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Clinical features and predictors of patients with critical limb ischemia who responded to autologous mononuclear cell transplantation for therapeutic angiogenesis.

Heart Vessels. 2017 Mar 29;:

Authors: Aoyama N, Nishinari M, Ohtani S, Kanai A, Noda C, Hirata M, Miyamoto A, Watanabe M, Minamino T, Izumi T, Ako J

Abstract
The clinical features of patients with critical limb ischemia (CLI) who responded to angiogenesis using autologous peripheral blood mononuclear cell transplantation (PB-MNC) have not yet been fully characterized, and there are no useful predictors to judge the curative effect in the early period after PB-MNC. This study sought to clarify the clinical features and predictors in patients with CLI who were successfully treated using PB-MNC. 30 consecutive patients [arteriosclerosis obliterans: 24 patients, thromboangiitis obliterans: 6 patients] who were diagnosed with major amputation despite maximal medical therapy were enrolled in this study. The study endpoint was major amputation within 3 months after PB-MNC. The collected data were evaluated for correlation between patients with and without major amputation within 3 months after PB-MNC. Six patients underwent major amputation and 1 patient underwent minor amputation. In the patients with major amputation, transcutaneous oxygen tension before PB-MNC and transplanted CD34-positive cells were lower than those of patients without major amputation. In the patients with amputation, interleukin-6 (IL-6) continued to increase after the first PB-MNC, and basic fibroblast growth factor (bFGF) decreased within 3 days after the first PB-MNC. PB-MNC was useful for the patients who were managed for inflammation and who had revascularization of the upper-popliteal arteries and two of the infra-popliteal arteries by endovascular and/or surgical revascularization. Variation in IL-6 and bFGF in the early period after PB-MNC could be useful predictors for the requirement of amputation within 3 months after PB-MNC.

PMID: 28357515 [PubMed - as supplied by publisher]

Categorías: Trasplante cardíaco
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