The Annals of Thoracic Surgery, Vol 33, 445-452, Copyright © 1982 by The Society of Thoracic Surgeons
Perioperative protection of the myocardium in patients with impaired ventricular function
SC Balderman, JN Bhayana, AZ Masud, S Michalek and AA Gage
Seventeen patients with poor ventricular function and severe coronary
artery obstruction were operated on employing hypothermic potassium
cardioplegic solution for myocardial preservation. Preoperatively and
postoperatively, serial hemodynamics, electrocardiograms (ECG), MB-CPK
studies, and technetium pyrophosphate scans were obtained for all patients.
All ECGs and scans were negative for perioperative infarction. Peak MB-CPK
levels were 40 +/- 25 units per liter. Two patients had MB-CPK levels
suggestive of perioperative myocardial infarction. The preoperative cardiac
index was 2.8 +/- 0.8 L/min/m2 and remained the same in the perioperative
period. Stroke work index and total peripheral resistance were within
normal range and remained constant throughout the period of study. Three
patients required epinephrine (0.5 micrograms per minute) during the first
6 hours postoperatively, and in 2 patients an intraaortic balloon was
inserted prophylactically and removed on the second postoperative day. Good
myocardial preservation can be achieved in patients with severe coronary
artery obstruction and preexisting left ventricular dysfunction using
hypothermic potassium cardioplegic solution.