Left-to-right systolic and diastolic ventricular interactions are dependent on right ventricular volume

Marc L. Dickstein, Koji Todaka, Daniel Burkhoff

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Three-compartment elastance modeling predicts that the magnitude of gain is solely dependent on the ratio of free wall and septal elastances. However, when nonlinearities in pressure-volume relationships are considered, the same model predicts that gain is load dependent. We therefore studied left-to- right ventricular interactions in the isolated cross-perfused canine heart preparation to determine whether, in fact, right ventricular volume modulates left-to-right ventricular interaction. We found that left-to-right systolic gain increased from 0.035 ± 0.022 to 0.073 ± 0.017 (P = 0.003) and left- to-right diastolic gain increased from 0.067 ± 0.050 to 0.186 ± 0.097 (P = 0.03) in response to increased right ventricular volume. This degree of volume dependency of gain is predicted by the three-compartment model when measured nonlinearities in time-varying elastance are taken into account. Future studies will need to account for changes in loading conditions when interpreting changes in systolic and diastolic interactions.

Original languageEnglish
Pages (from-to)H2869-H2874
JournalAmerican Journal of Physiology - Heart and Circulatory Physiology
Issue number6 41-6
Publication statusPublished - 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)


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