Systolic ventricular interaction in normal and diseased explanted human hearts

J. P. Slater, E. C. Lipsitz, J. M. Chen, H. R. Levin, M. C. Oz, D. J. Goldstein, R. C. Ashton, D. Burkhoff

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Objective: The purpose of this study was to quantify the magnitude of interaction between the right and left ventricles in conditions of heart failure. Methods: Human hearts were taken from transplant recipients diagnosed with dilated cardiomyopathy at the time of transplantation and were restored to beating condition with use of an isolated perfusion circuit. Left ventricular-right ventricular interaction was determined by ramping volume in the left ventricle while holding right ventricular volume constant. Right ventricular pressure gain was plotted against left ventricular pressure and the slope of the linear regression determined the left ventricular-right ventricular interaction. A similar procedure was used to determine right ventricular-left ventricular interaction. Two normal hearts were obtained from transplant donors not suitable for cardiac donation to serve as control hearts. Results: Mean left ventricular-right ventricular interaction was 0.22 in the hearts with dilated cardiomyopathy compared with 0.06 in the control hearts. Mean right ventricular-left ventricular interaction was 0.14 in the hearts with dilated cardiomyopathy compared with 0.09 in the control hearts. A marked increase in left ventricular-right ventricular interaction was noted in the hearts with dilated cardiomyopathy compared with control hearts. Although observed values of right ventrlcular-left ventricular interaction also correspond to previously published results, no significant increase was observed in the dilated cardiomyopathy condition. Conclusions: These studies confirm previously published values for systolic ventricular interaction obtained with animal models and demonstrate a marked increase in the dependence of the right ventricle on left ventricular function to maintain systolic pressure generation during conditions of dilated cardiomyopathy.

Original languageEnglish (US)
Pages (from-to)1091-1099
Number of pages9
JournalJournal of Thoracic and Cardiovascular Surgery
Volume113
Issue number6
DOIs
StatePublished - Jan 1 1997
Externally publishedYes

ASJC Scopus subject areas

  • Surgery
  • Pulmonary and Respiratory Medicine
  • Cardiology and Cardiovascular Medicine

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