Right ventricular afterload sensitivity dramatically increases after left ventricular assist device implantation: A multi-center hemodynamic analysis

Brian A. Houston, Rohan J. Kalathiya, Steven Hsu, Rahul Loungani, Mary E. Davis, Samuel T. Coffin, Nicholas Haglund, Simon Maltais, Mary E. Keebler, Peter J. Leary, Daniel P. Judge, Gerin R. Stevens, John Rickard, Chris M. Sciortino, Glenn J. Whitman, Ashish S. Shah, Stuart D. Russell, Ryan J. Tedford

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

Background Right ventricular (RV) failure is a source of morbidity and mortality after left ventricular assist device (LVAD) implantation. In this study we sought to define hemodynamic changes in afterload and RV adaptation to afterload both early after implantation and with prolonged LVAD support. Methods We reviewed right heart catheterization (RHC) data from participants who underwent continuous-flow LVAD implantation at our institutions (n = 244), excluding those on inotropic or vasopressor agents, pulmonary vasodilators or additional mechanical support at any RHC assessment. Hemodynamic data were assessed at 5 time intervals: (1) pre-LVAD (within 6 months); (2) early post-LVAD (0 to 6 months); (3) 7 to 12 months; (4) 13 to 18 months; and (5) very late post-LVAD (18 to 36 months). Results Sixty participants met the inclusion criteria. All measures of right ventricular load (effective arterial elastance, pulmonary vascular compliance and pulmonary vascular resistance) improved between the pre- and early post-LVAD time periods. Despite decreasing load and pulmonary artery wedge pressure (PAWP), RAP remained unchanged and the RAP:PAWP ratio worsened early post-LVAD (0.44 [0.38, 0.63] vs 0.77 [0.59, 1.0], p < 0.001), suggesting a worsening of RV adaptation to load. With continued LVAD support, both RV load and RAP:PAWP decreased in a steep, linear and dependent manner. Conclusions Despite reducing RV load, LVAD implantation leads to worsened RV adaptation. With continued LVAD support, both RV afterload and RV adaptation improve, and their relationship remains constant over time post-LVAD. These findings suggest the RV afterload sensitivity increases after LVAD implantation, which has major clinical implications for patients struggling with RV failure.

Original languageEnglish (US)
Pages (from-to)868-876
Number of pages9
JournalJournal of Heart and Lung Transplantation
Volume35
Issue number7
DOIs
StatePublished - Jul 1 2016
Externally publishedYes

    Fingerprint

Keywords

  • LVAD
  • pulmonary effective arterial elastance
  • pulmonary vascular compliance
  • right ventricular adapation
  • right ventricular load

ASJC Scopus subject areas

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

Cite this

Houston, B. A., Kalathiya, R. J., Hsu, S., Loungani, R., Davis, M. E., Coffin, S. T., Haglund, N., Maltais, S., Keebler, M. E., Leary, P. J., Judge, D. P., Stevens, G. R., Rickard, J., Sciortino, C. M., Whitman, G. J., Shah, A. S., Russell, S. D., & Tedford, R. J. (2016). Right ventricular afterload sensitivity dramatically increases after left ventricular assist device implantation: A multi-center hemodynamic analysis. Journal of Heart and Lung Transplantation, 35(7), 868-876. https://doi.org/10.1016/j.healun.2016.01.1225