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Eur J Cardiothorac Surg 2002;22:410-414
© 2002 Elsevier Science NL

Coronary active perfusion system can maintain myocardial blood flow and tissue oxygenation

^a Department of Surgery (I), Kanazawa University School of Medicine, Takaramachi 13-1, Kanazawa 920-8641, Japan
^b Department of Surgery (I), Toyama Medical and Pharmaceutical University, Toyama 930-0194, Japan
^c Cardiovascular Division, Kumamoto Central Hospital, Kumamoto 862-0965, Japan

Received 15 February 2002; received in revised form 29 April 2002; accepted 15 May 2002.

* Corresponding author. Tel.: +81-76-265-2356; fax: +81-76-222-6833
e-mail: h.kamiya{at}triton.ocn.ne.jp

Objectives: To avoid myocardial ischemia in off-pump coronary artery bypass, we developed a coronary active perfusion system (CAPS). The purposes of this study were to investigate the changes in myocardial blood flow and tissue oxygenation during CAPS perfusion, and to validate the ventricular arrthymias and hemodynamic deterioration preventing the effect. Methods: Sixteen pigs were divided into a CAPS perfusion group (group C) and a simple coronary occlusion group (group O). The left anterior descending coronary artery was snared in both groups and 30 min of CAPS perfusion was performed in group C. Results: Ventricular arrhythmias were not observed in group C, but occurred in seven out of eight pigs in group O (P=0.003). None of the hemodynamic variables changed in group C, but they deteriorated in group O. Myocardial blood flow, saturation, and hemoglobin plus myoglobin concentration were maintained with a baseline level in group C, but decreased significantly in group O (P<0.001). Conclusion: CAPS is a reliable method to avoid myocardial ischemia during coronary occlusion and it may be useful for off-pump coronary artery bypass

Key Words: Off-pump coronary artery bypass • Coronary active perfusion system • Myocardial blood flow • Myocardial oxygenation

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