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Functional consequences of the right ventricular isolation procedure.

Publication ,  Journal Article
Damiano, RJ; Asano, T; Smith, PK; Ferguson, TB; Cox, JL
Published in: J Thorac Cardiovasc Surg
October 1990

The right ventricular free wall was surgically isolated from the remainder of the heart in eight dogs to evaluate the functional consequences of this procedure. Each dog was instrumented with ultrasonic dimension transducers in the right and left ventricular free walls, intracavitary micromanometers, and pulmonary artery flow probes. Volume loading and vena caval occlusions were performed to assess diastolic compliance and systolic function. Right ventricular unstressed myocardial segment length increased from 14.2 +/- 0.7 to 15.0 +/- 0.8 mm (p less than 0.5). There was an accompanying significant postoperative loss of right ventricular diastolic compliance (p less than 0.005). Regional right ventricular systolic function and regional left ventricular diastolic compliance and systolic function were preserved after the procedure. Postoperatively, when the right ventricular free wall was not paced and left silent, right ventricular stroke work decreased from 7.0 +/- 0.8 to 2.7 +/- 0.5 gm-m/m2 (p less than 0.05). These data demonstrate that the diastolic compliance of the right ventricular free wall decreases significantly after right ventricular isolation. However, there were no changes in regional right ventricular systolic or regional left ventricular function. The isolated right ventricular free wall contributes significantly to postoperative cardiac performance.

Duke Scholars

Published In

J Thorac Cardiovasc Surg

ISSN

0022-5223

Publication Date

October 1990

Volume

100

Issue

4

Start / End Page

569 / 579

Location

United States

Related Subject Headings

  • Ventricular Function
  • Systole
  • Respiratory System
  • Hemodynamics
  • Heart Ventricles
  • Electrocardiography
  • Dogs
  • Diastole
  • Compliance
  • Cardiac Pacing, Artificial
 

Citation

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Damiano, R. J., Asano, T., Smith, P. K., Ferguson, T. B., & Cox, J. L. (1990). Functional consequences of the right ventricular isolation procedure. J Thorac Cardiovasc Surg, 100(4), 569–579.
Damiano, R. J., T. Asano, P. K. Smith, T. B. Ferguson, and J. L. Cox. “Functional consequences of the right ventricular isolation procedure.J Thorac Cardiovasc Surg 100, no. 4 (October 1990): 569–79.
Damiano RJ, Asano T, Smith PK, Ferguson TB, Cox JL. Functional consequences of the right ventricular isolation procedure. J Thorac Cardiovasc Surg. 1990 Oct;100(4):569–79.
Damiano, R. J., et al. “Functional consequences of the right ventricular isolation procedure.J Thorac Cardiovasc Surg, vol. 100, no. 4, Oct. 1990, pp. 569–79.
Damiano RJ, Asano T, Smith PK, Ferguson TB, Cox JL. Functional consequences of the right ventricular isolation procedure. J Thorac Cardiovasc Surg. 1990 Oct;100(4):569–579.
Journal cover image

Published In

J Thorac Cardiovasc Surg

ISSN

0022-5223

Publication Date

October 1990

Volume

100

Issue

4

Start / End Page

569 / 579

Location

United States

Related Subject Headings

  • Ventricular Function
  • Systole
  • Respiratory System
  • Hemodynamics
  • Heart Ventricles
  • Electrocardiography
  • Dogs
  • Diastole
  • Compliance
  • Cardiac Pacing, Artificial