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Related Experiment Videos

Calcium sensitising agents in heart failure

L Mathew1, S D Katz

  • 1Columbia Presbyterian Medical Center, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York, USA.

Drugs & Aging
|April 16, 1998
PubMed
Summary

Calcium sensitizing agents offer positive inotropic effects for congestive heart failure (CHF) but require further study. Long-term safety and efficacy of these agents, which often inhibit phosphodiesterase type III, remain uncertain.

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Area of Science:

  • Cardiology
  • Pharmacology

Background:

  • Congestive heart failure (CHF) is characterized by reduced cardiac output.
  • Positive inotropic agents are explored for CHF treatment.
  • Previous trials showed increased mortality risk with some positive inotropic drugs.

Purpose of the Study:

  • To review calcium sensitizing agents as potential therapies for CHF.
  • To evaluate their mechanism of action and clinical trial outcomes.

Main Methods:

  • Review of existing literature on calcium sensitizing agents.
  • Analysis of their effects on cardiac tissue and animal models.
  • Examination of clinical trial data for agents like pimobendan.

Main Results:

  • Five calcium sensitizing agents demonstrated positive inotropic action in preclinical studies.
  • Pimobendan showed improved exercise tolerance in early trials but a trend towards increased mortality.
  • Many agents also inhibit phosphodiesterase type III, raising safety concerns.

Conclusions:

  • Calcium sensitizing agents have shown promise in preclinical and early clinical CHF studies.
  • Long-term safety and efficacy, particularly regarding mortality, require large-scale survival trials.
  • The role of these agents in CHF treatment is not yet defined.

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