Cardiac function evaluated by transesophageal echocardiography during cardiopulmonary bypass.

Autor: Kubota, Hiroshi, Furuse, Akira, Kotsuka, Yutaka, Ninomiya, Mikio, Miyaji, Kagami, Endo, Munemoto, Takamoto, Shinichi
Zdroj: Japanese Journal of Thoracic & Cardiovascular Surgery; 2000, Vol. 48 Issue 5, p261-266, 6p
Abstrakt: Objective: To evaluate cardiac function at cardiopulmonary bypass weaning, we applied a new technique clinically to determine the approximated Emax without using a conductance catheter. Methods: Subjects were 5 patients. The left ventricular end-systolic pressure was obtained by overlaying the radial arterial pressure curve on the left ventricular pressure curve. Left ventricular end-systolic volume was assessed by a transesophageal echographic apparatus. At cardiopulmonary bypass weaning, volume loading was applied to increase left atrial pressure by a few mmHg while fixing the pump flow rate at half flow. Changes in left ventricular end-systolic volume and approximated left ventricular end-systolic pressure for total heart beat were plotted during this period, and the gradient of the regression line was taken as approximated Emax. Results: Approximated Emax ranged from 1.29 to 3.28 (mean 2.13 ± 0.72), and its correlation coefficient was 0.80 ± 0.06. Conclusion: Our new technique is useful in evaluating cardiac function during cardiopulmonary bypass. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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