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Comparative study on cardiomyoplasty patients with the cardiomyostimulator on versus off
O Taşdemir1, K M Vural, S D Küçükaksu
1Department of Cardiovascular Surgery, Türkiye Yüksek Ihtisas Hospital, Ankara, Turkey.
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).(ABSTRACT TRUNCATED)