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Dynamic right ventricular dimension. Relation to chamber volume during the cardiac cycle.

Publication ,  Journal Article
Morris, JJ; Pellom, GL; Hamm, DP; Everson, CT; Wechsler, AS
Published in: J Thorac Cardiovasc Surg
June 1986

Whereas the left ventricle has been analyzed extensively, the apparent complexity of right ventricular geometry and contraction has hindered analysis of right ventricular performance by an assessment of instantaneous ventricular dimensions and volume during the cardiac cycle. To address this issue, we examined the temporal and quantitative relation between dynamic right ventricular free wall dimension, rate of pressure development (dP/dt), and pulmonary artery flow in the open-chest dog. Right ventricular free wall chord dimension was recorded by sonomicrometry, right ventricular pressure by micromanometer-tipped catheter, and pulmonary flow by electromagnetic probe. The point of peak positive right ventricular dP/dt closely correlated with the end of isovolumic contraction and initiation of ejection, occurring within 10 +/- 25 msec of initiation of pulmonary flow. Right ventricular dimension at peak positive dP/dt differed from dimension at initiation of chord shortening by less than 3%. Peak negative dP/dt correlated with end ejection, occurring within 10 +/- 25 msec of cessation of pulmonary flow. Right ventricular dimension at peak negative dP/dt differed from minimal dimension by less than 1%. In all dogs, volume ejected from the right ventricular chamber during each cardiac cycle was directly related to the change in right ventricular dimension during the same period (mean r = 0.969). This relationship between right ventricular stroke volume and dimensional change remained linear and was not changed (p = NS) by increases in right or left ventricular afterload induced by constricting the pulmonary artery or descending aorta. Right ventricular stroke work, calculated as the integral of instantaneous right ventricular pressure and dimension, correlated well (mean r = 0.980) with directly measured global right ventricular stroke work over a wide range; it was also not changed (p = NS) by changes in afterload. Accurate assessments of beat-to-beat right ventricular chamber volume and stroke work can be obtained by analysis of dynamic right ventricular chord dimension.

Duke Scholars

Published In

J Thorac Cardiovasc Surg

ISSN

0022-5223

Publication Date

June 1986

Volume

91

Issue

6

Start / End Page

879 / 887

Location

United States

Related Subject Headings

  • Ventricular Function
  • Stroke Volume
  • Respiratory System
  • Pulmonary Artery
  • Myocardial Contraction
  • Manometry
  • Heart
  • Electromagnetic Phenomena
  • Dogs
  • Cardiac Volume
 

Citation

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Morris, J. J., Pellom, G. L., Hamm, D. P., Everson, C. T., & Wechsler, A. S. (1986). Dynamic right ventricular dimension. Relation to chamber volume during the cardiac cycle. J Thorac Cardiovasc Surg, 91(6), 879–887.
Morris, J. J., G. L. Pellom, D. P. Hamm, C. T. Everson, and A. S. Wechsler. “Dynamic right ventricular dimension. Relation to chamber volume during the cardiac cycle.J Thorac Cardiovasc Surg 91, no. 6 (June 1986): 879–87.
Morris JJ, Pellom GL, Hamm DP, Everson CT, Wechsler AS. Dynamic right ventricular dimension. Relation to chamber volume during the cardiac cycle. J Thorac Cardiovasc Surg. 1986 Jun;91(6):879–87.
Morris, J. J., et al. “Dynamic right ventricular dimension. Relation to chamber volume during the cardiac cycle.J Thorac Cardiovasc Surg, vol. 91, no. 6, June 1986, pp. 879–87.
Morris JJ, Pellom GL, Hamm DP, Everson CT, Wechsler AS. Dynamic right ventricular dimension. Relation to chamber volume during the cardiac cycle. J Thorac Cardiovasc Surg. 1986 Jun;91(6):879–887.
Journal cover image

Published In

J Thorac Cardiovasc Surg

ISSN

0022-5223

Publication Date

June 1986

Volume

91

Issue

6

Start / End Page

879 / 887

Location

United States

Related Subject Headings

  • Ventricular Function
  • Stroke Volume
  • Respiratory System
  • Pulmonary Artery
  • Myocardial Contraction
  • Manometry
  • Heart
  • Electromagnetic Phenomena
  • Dogs
  • Cardiac Volume