Electron Microscopic Study of Driving Diaphragms in Long-Term Survival with a Total Artificial Heart

1995 ◽  
Vol 19 (4) ◽  
pp. 344-354 ◽  
Author(s):  
Jaromír Vašku̇ ◽  
Petr Urbánek
2020 ◽  
Vol 58 (6) ◽  
pp. 1175-1181
Author(s):  
Charles-Henri David ◽  
Philippe Lacoste ◽  
Prakash Nanjaiah ◽  
Philippe Bizouarn ◽  
Thierry Lepoivre ◽  
...  

Abstract OBJECTIVES At our centre, the SynCardia temporary Total Artificial Heart (TAH-t) (SynCardia Systems, LLC, Tucson, AZ, USA) is used to provide long-term support for patients with biventricular failure as a bridge to a transplant. However, a heart transplant (HT) after such support remains challenging. The aim of this retrospective study was to assess the immediate and long-term results following an HT in the cohort of patients who had a TAH-t implant. METHODS A total of 73 patients were implanted with the TAH-t between 1988 and 2019 in our centre. Of these 73 consecutive patients, 50 (68%) received an HT and are included in this retrospective analysis of prospectively collected data. RESULTS In the selected cohort, in-hospital mortality after an HT was 10% (n = 5). The median intensive care unit stay was 33 days (range 5–278). The median hospital stay was 41 days (range 28–650). A partial or total pericardiectomy was performed during the HT procedure in 21 patients (42%) due to a severe pericardial reaction. Long-term survival rates after an HT at 5, 10 and 12 years were 79.1 ± 5.9% (n = 32), 76.5 ± 6.3% (n = 22) and 72.4 ± 7.1% (n = 12), respectively, which was similar to the long-term survival for a primary HT without TAH-t during the same period (n = 686). An HT performed within 3–6 months post-TAH-t implantation appeared to provide the best survival (P = 0.007). Eight (16%) patients required chronic dialysis during the subsequent follow-up period, with 3 patients requiring a kidney transplant. CONCLUSIONS The long-term outcomes with the SynCardia TAH-t as a bridge to transplant in patients with severe biventricular failure are very encouraging. Our review noted that an HT following TAH-t can be technically challenging, especially in the case of a severe pericardial reaction, with potential pitfalls that should be recognized preoperatively.


1993 ◽  
Vol 123 (2) ◽  
pp. 174-180 ◽  
Author(s):  
Gregory A. Helm ◽  
Patricia E. Palmer ◽  
Nathan E. Simmons ◽  
Charles G. DiPierro ◽  
James P. Bennett

1993 ◽  
Vol 264 (5) ◽  
pp. H1727-H1733 ◽  
Author(s):  
G. Y. Koh ◽  
M. H. Soonpaa ◽  
M. G. Klug ◽  
L. J. Field

The long-term viability of cardiomyocyte grafts in the adult myocardium was tested. AT-1 cardiomyocytes, a differentiated tumor line derived from transgenic mice expressing an atrial natriuretic factor-simian virus 40 T antigen fusion gene, were grafted directly into the myocardium of syngeneic animals. Viable grafts were detected as long as 4 mo postimplantation. Thymidine uptake studies suggested that the grafted cardiomyocytes retained mitotic activity. The presence of AT-1 cardiomyocyte grafts and the associated myocardial remodeling were not accompanied by overt cardiac arrhythmia. Electron microscopic analyses showed that the majority of the grafts were juxtaposed directly to the host myocardium and were not encapsulated. This study indicates that the myocardium can serve as a stable platform for cells that have been manipulated in vitro and suggests that cardiomyocyte grafts may provide a useful means for the local delivery of recombinant molecules to the heart. The long-term survival of the AT-1 cardiomyocytes in the heart also raises the possibility that similar grafting approaches may be used to replace diseased myocardium.


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