| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Ann Thorac Surg 1996;62:1708-1713
© 1996 The Society of Thoracic Surgeons
uz Ta
demir, MD
Departments of Cardiovascular Surgery and Cardiology, Türkiye Yüksek 
htisas Hospital, Ankara, Turkey
Accepted for publication June 25, 1996.
Background. A major concern in evaluating dynamic cardiomyoplasty has been whether the synchronous stimulation of latissimus dorsi muscle is essential for benefit or not. We studied 10 patients to determine the efficacy of the systolic augmentation generated by the synchronous electrical stimulation of the latissimus dorsi muscle.
Methods. Left ventricular ejection fraction, end-systolic and end-diastolic volume indexes, and stroke volume index obtained during resting, peak exercise, and recovery periods ("on" values) were compared with those obtained 1 week after cessation of electrical stimulus ("off" values). Double product and estimated total body oxygen consumption at peak exercise were also calculated and compared.
Results. Higher ejection fractions (0.36 ± 0.07 versus 0.33 ± 0.06 at rest, 0.40 ± 0.07 versus 0.33 ± 0.07 at peak exercise, and 0.37 ± 0.06 versus 0.31 ± 0.06 at recovery) and lower end-systolic volume indexes with relatively constant end-diastolic volume indexes were observed with the cardiomyostimulator on. Further, exercise response was better with the cardiomyostimulator on. Double product indirectly reflected better myocardial oxygen supply/demand ratio when on at peak exercise (17 ± 2.2 mm Hg x beats/min x 10-3 for on versus 19 ± 2.6 mm Hg x beats/min x 10-3 for off). Estimated total body oxygen consumption was improved at peak exercise when the cardiomyostimulator was functional (12 ± 2.7 mL•kg-1•min-1 versus 11 ± 2.6 mL•kg-1•min-1).
Conclusions. Current data suggest a true systolic assist during synchronous contractions of the latissimus dorsi muscle. It is thought, therefore, that synchronous electrical stimulation is essential for maximum benefit and all the beneficial effect of cardiomyoplasty certainly cannot be attributed to simple wrapping itself.
This article has been cited by other articles:
|
|
 |
|
  A. Benicio, L. F. P. Moreira, F. Bacal, N. A. G. Stolf, and S. A. Oliveira Reevaluation of long-term outcomes of dynamic cardiomyoplasty Ann. Thorac. Surg., September 1, 2003; 76(3): 821 - 827. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. Bolotin, R. Lorusso, J. J. Schreuder, H. G. Kaulbach, G. Uretzky, and F. H. van der Veen Effects of acute dynamic cardiomyoplasty in a goat model of chronic ventricular dilatation: part 1 Ann. Thorac. Surg., August 1, 2002; 74(2): 507 - 513. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
U. Carraro, M. Barbiero, G. Docali, A. Cotogni, G. Rigatelli, D. Casarotto, and C. Muneretto Demand dynamic cardiomyoplasty: mechanograms prove incomplete transformation of the rested latissimus dorsi Ann. Thorac. Surg., July 1, 2000; 70(1): 67 - 73. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. M. Vural, O. Tasdemir, S. D. Kucukaksu, O. K. Tarcan, and K. Bayazit Optimization of Synchronization Delay in Latissimus Dorsi Dynamic Cardiomyoplasty Ann. Thorac. Surg., May 1, 1998; 65(5): 1231 - 1234. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| ANN THORAC SURG | ASIAN CARDIOVASC THORAC ANN | EUR J CARDIOTHORAC SURG |
| J THORAC CARDIOVASC SURG | ICVTS | ALL CTSNet JOURNALS |
