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The Annals of Thoracic Surgery, Vol 53, 965-970, Copyright © 1992 by The Society of Thoracic Surgeons

ARTICLES

Coronary sinus cardioplegia: clinical trial with only retrograde approach

KV Arom and RW Emery
Minneapolis Heart Institute, Minnesota 55407.

The cases of 100 consecutive patients who underwent coronary artery bypass grafting with coronary sinus (retrograde) cardioplegia (group R) without the antegrade-retrograde approach were reviewed. To evaluate the safety and the efficacy of this technique, another 100 consecutive patients who underwent a similar procedure but with conventional aortic root (antegrade) cardioplegia (group A) were used as a comparison. The two groups were similar with respect to age, male to female ratio, associated medical problems, extent of coronary artery disease, mean preoperative ejection fraction (0.56 +/- 0.13 versus 0.53 +/- 0.18), pump time (113.1 +/- 43 versus 111.7 +/- 38 minutes), aortic cross- clamp time (57.4 +/- 20 versus 60.8 +/- 23 minutes), number of grafts per patient, level of hypothermia, complication rate, rate of postoperative myocardial infarction (4% versus 3%), and mortality rate (2% versus 2%). Hemodynamic measurements were made 6 hours after operation in 59 patients in group R and 47 patients in group A. The cardiac index, left ventricular stroke work index, and right ventricular stroke work index were better in group R but not significantly so (p greater than 0.05). However, only 27% of patients in group R required a temporary pacemaker, and only 9% needed inotropic agents after 6 hours of operation in contrast to 51% and 42%, respectively, in group A (p less than 0.05). There were no complications from catheter intubation. In group R, right ventricular wall temperature (11 degrees +/- 3.6 degrees C) was higher than the septal (10.8 degrees +/- 3.2 degrees C) and left ventricular wall temperatures (9.1 degrees +/- 2.8 degrees C) (p greater than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)

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