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The "missing" link between acute hemodynamic effect and clinical response

Frits W Prinzen1, Angelo Auricchio

  • 1Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, The Netherlands. frits.prinzen@maastrichtuniversity.nl

Journal of Cardiovascular Translational Research
|November 18, 2011
PubMed

Insights

Cardiac resynchronization therapy (CRT) effects are immediate but may not predict long-term outcomes. Reversing dyssynchrony-induced remodeling is key for maximal CRT response, suggesting a paradigm shift in treatment.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Heart Failure Management

Background:

  • Cardiac resynchronization therapy (CRT) provides immediate hemodynamic, mechanical, and electrical benefits.
  • Acute hemodynamic improvements from CRT do not consistently predict long-term patient outcomes.
  • The discrepancy between acute effects and long-term benefits necessitates exploring other contributing factors.

Purpose of the Study:

  • To investigate the relationship between acute hemodynamic effects and long-term outcomes in CRT.
  • To explore the role of cardiac dyssynchrony and subsequent remodeling in CRT response.
  • To propose a paradigm shift for optimizing long-term CRT efficacy.

Main Methods:

  • Review of existing literature on CRT effects and outcomes.
  • Analysis of studies investigating cardiac remodeling in response to CRT.
  • Correlation of hemodynamic changes with structural, electrical, and contractile modifications.

Main Results:

  • Immediate hemodynamic benefits of CRT do not reliably predict long-term success.
  • Cardiac dyssynchrony is linked to extensive structural, electrophysiological, and contractile remodeling.
  • CRT can reverse remodeling processes, even with limited acute hemodynamic improvement.

Conclusions:

  • Long-term CRT response may depend more on reversing cardiac remodeling than on acute hemodynamic changes.
  • A shift in focus towards addressing dyssynchrony-induced remodeling is crucial for maximizing CRT benefits.
  • Optimizing CRT strategies may require a new approach beyond immediate hemodynamic optimization.

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