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Ann Thorac Surg 1976;22:343-346
© 1976 The Society of Thoracic Surgeons

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Articles

Comparison of Patients with Coronary Artery or Valve Disease

Intraoperative Differences in Blood Volume and Observations of Vasomotor Response

Departments of Surgery and Anesthesia, State University of New York Upstate Medical Center, 750 E Adams St, Syracuse, NY 13210

Accepted for publication May 17, 1976.

^* Address reprint requests to Dr. Hanson, Department of Surgery, 750 E Adams St, Syracuse, NY 13210.

A review of 296 patients undergoing cardiac operations has shown that those with coronary artery disease have a blood volume deficit. The 148 patients with valve disease had a normal blood volume of 78 ml/kg (normal range, 68–88 ml/kg), while the 148 with coronary artery disease had a blood volume of 69 ml/kg (p < 0.001). Infusion of plasma prior to cardiopulmonary bypass as well as the total transfusion required afterward to maintain blood pressure indicated an important clinical difference in these two groups. Another finding was that the requirement for a drug to control blood pressure prior to use of cardiopulmonary bypass was greater in the coronary patients (p < 0.01). Comparison of the requirement for a hypotensive agent before and after bypass showed a greater predictability in the valve group. This experience leads us to conclude that patients with coronary artery disease and angina not only have a low blood volume, but they also have a marked vasoactive lability which shows up in their hemodynamic response to the conduct of an operation and to anesthesia.

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