The Annals of Thoracic Surgery, Vol 43, 522-526, Copyright © 1987 by The Society of Thoracic Surgeons
Regional myocardial perfusion of cardioplegic solutions
J Eugene, KP Lyons, RA Ott, VL Gelezunas, CW Chang, MG Kowall and NJ Haiduc
We compared the regional myocardial perfusion of blood cardioplegic
solution (BCP) and crystalloid cardioplegic solution (CCP) in 14 mongrel
dogs. Cardiopulmonary bypass was established at 28 degrees C, and a
hydraulic occluder was placed around the proximal left anterior descending
(LAD) coronary artery. In group 1 (N = 7) collateral coronary arteries were
ligated; in group 2 (N = 7) collateral coronary arteries were left in situ.
After the aorta was clamped, BCP and CCP were alternately perfused at 200
ml/min. The occluder was inflated to produce moderate, severe, and critical
LAD stenosis, and regional perfusion was measured by xenon-133 washout with
the Silicon Avalanche Radiation Detector. BCP infusion produced a
consistently higher aortic pressure, but CCP flow was better than BCP flow
under all conditions, particularly without coronary collaterals (p less
than .05). Regional myocardial perfusion of CCP is superior to BCP.