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Ann Thorac Surg 1986;42:65-69
© 1986 The Society of Thoracic Surgeons

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Articles

Electrophysiologic Effects of Surgical Isolation of the Right Ventricle

From the Department of Surgery, Duke University Medical Center, Durham, NC, and the Division of Cardiothoracic Surgery, Washington University Medical Center, St. Louis, MO

Accepted for publication October 26, 1985.

^* Address reprint requests to Dr. Cox, Division of Cardiothoracic Surgery, Washington University Medical Center, Suite 3108 Queeny Tower, 4989 Barnes Hospital Plaza, St. Louis, MO 63110

Surgical isolation of the entire right ventricular free-wall was performed in ten dogs to evaluate the effects of the procedure on a variety of electrophysiologic measurements. Complete surgical isolation of the right ventricle was confirmed by determining that right ventricular electrical activity was not conducted to the remainder of the heart and that electrical activity in the atria or left ventricle did not conduct to the right ventricle. Right ventricular isolation caused no change in right ventricular or left ventricular pacing thresholds, in effective refractory periods of the right ventricle or left ventricle, or in right ventricular free-wall conduction time. Moreover, the normal conduction time from the right atrium to the left ventricle was 139 ± 5 msec (mean ± standard error) preoperatively and 135 ± 5 msec postoperatively (p is not significant), showing that atrial-to-left ventricular synchrony was unaltered by isolation of the right ventricle. However, following isolation, the right ventricle could not be electrically fibrillated in 9 of 10 animals, a finding that may have important implications in the future development of surgical procedures to control chronic, life-threatening ventricular tachyarrhythmias.

This article has been cited by other articles:

				R. J. Damiano Jr., T. Asano, P. K. Smith, T. B. Ferguson Jr., and J. L. Cox Right Ventricular Free Wall Isolation: Effects on Regional Myocardial Blood Flow Ann. Thorac. Surg., October 1, 1988; 46(4): 391 - 395. [Abstract] [PDF]

				R. J. Damiano Jr., T. Asano, P. K. Smith, T. B. Ferguson, and J. L. Cox Hemodynamic Consequences of Right Ventricular Isolation: The Contribution of the Right Ventricular Free Wall to Cardiac Performance Ann. Thorac. Surg., September 1, 1988; 46(3): 324 - 330. [Abstract] [PDF]