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Related Experiment Videos

Calcium antagonists in heart failure.

H Reicher-Reiss1

  • 1Heart Institute, Chaim Sheba Medical Center, Tel Hashomer, Israel.

European Heart Journal
|June 1, 1988
PubMed
Summary
This summary is machine-generated.

Calcium channel blockers can improve heart function in patients with heart failure by reducing afterload. Studies suggest nifedipine effectively decreases systemic vascular resistance and increases cardiac output without significantly altering heart rate.

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Area of Science:

  • Cardiology
  • Pharmacology

Background:

  • Ischemic heart disease frequently causes congestive heart failure (CHF), leading to further left ventricular dysfunction.
  • Calcium channel blockers (CCBs) may benefit patients with CHF and myocardial ischemia due to improved systolic function from decreased afterload.
  • Concerns exist regarding CCBs' negative inotropic effects at high doses, potentially worsening systolic function.

Purpose of the Study:

  • To establish the therapeutic role of CCBs in patients with CHF.
  • To evaluate the hemodynamic effects of nifedipine in CHF patients.
  • To assess the efficacy of nisoldipine in severe CHF.

Main Methods:

  • Review of clinical data on oral/sublingual nifedipine administration in CHF.
  • Analysis of hemodynamic changes including systemic vascular resistance, cardiac output, heart rate, and pressures.

Related Experiment Videos

  • Evaluation of nisoldipine in a chronic 8-week study in severe CHF patients.

    • Main Results:

    • Nifedipine administration decreased systemic vascular resistance by 33% and increased cardiac output by 24% in CHF patients.
    • Heart rate remained largely unchanged, with minimal changes in right atrial pressures.
    • Pulmonary capillary wedge pressure decreased by 16%, with a more favorable response in more severe CHF.
    • Nisoldipine was evaluated in severe CHF over 8 weeks.

    Conclusions:

    • Nifedipine's dominant hemodynamic effect in CHF is vasodilation, reducing left ventricular afterload and improving cardiac output.
    • The vasodilatory effect of nifedipine appears to outweigh potential negative inotropic effects in CHF patients.
    • Further evaluation of CCBs like nisoldipine is warranted for severe CHF management.