HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Personal Folders Download to citation manager Permission Requests Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Morris, J. J. Articles by Wechsler, A. S. Search for Related Content PubMed PubMed Citation Articles by Morris, J. J., 3d Articles by Wechsler, A. S.

The Journal of Thoracic and Cardiovascular Surgery, Vol 91, 879-887, Copyright © 1986 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

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

JJ Morris 3d, GL Pellom, DP Hamm, CT Everson and AS Wechsler

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.

This article has been cited by other articles:

				M. Karamanoglu, M. McGoon, R. P. Frantz, R. L. Benza, R. C. Bourge, R. J. Barst, B. Kjellstrom, and T. D. Bennett Right Ventricular Pressure Waveform and Wave Reflection Analysis in Patients With Pulmonary Arterial Hypertension Chest, July 1, 2007; 132(1): 37 - 43. [Abstract] [Full Text] [PDF]

				M. K. Karunanithi and M. P. Feneley Limitations of unidimensional indexes of right ventricular contractile function in conscious dogs J. Thorac. Cardiovasc. Surg., August 1, 2000; 120(2): 302 - 312. [Abstract] [Full Text] [PDF]

				T. Sugimoto, M. Okada, N. Ozaki, T. Kawahira, and M. Fukuoka Influence of functional tricuspid regurgitation on right ventricular function Ann. Thorac. Surg., December 1, 1998; 66(6): 2044 - 2050. [Abstract] [Full Text] [PDF]

				J. G. Markley and A. C. Nicolosi Effects of Left Heart Assist on Geometry and Function of the Interventricular Septum Ann. Thorac. Surg., December 1, 1996; 62(6): 1752 - 1758. [Abstract] [Full Text]

				A. C. Nicolosi, D. A. Hettrick, and D. C. Warltier Assessment of Right Ventricular Function in Swine Using Sonomicrometry and Conductance Ann. Thorac. Surg., May 1, 1996; 61(5): 1381 - 1387. [Abstract] [Full Text]

				R. De Simone, R. Lange, F.-U. Sack, H. Mehmanesh, and S. Hagl Atrioventricular Valve Insufficiency and Atrial Geometry After Orthotopic Heart Transplantation Ann. Thorac. Surg., December 1, 1995; 60(6): 1686 - 1693. [Abstract] [Full Text]

				M. Oe, J. Gorcsan III, W. A. Mandarino, A. Kawai, B. P. Griffith, and R. L. Kormos Automated Echocardiographic Measures of Right Ventricular Area as an Index of Volume and End-Systolic Pressure-Area Relations to Assess Right Ventricular Function Circulation, August 15, 1995; 92(4): 1026 - 1033. [Abstract] [Full Text]

				K. Fujita, G. E. McGrath, T. Morita, B. L. Robinson, J. W. Davis, and J. J. Morris The effects of left heart assist on right ventricular muscle mechanics and ventricular coupling in the injured heart J. Thorac. Cardiovasc. Surg., September 1, 1994; 108(3): 477 - 486. [Abstract] [Full Text]