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Related Experiment Videos

Nitroglycerin in chronic stable angina pectoris.

N Reichek1

  • 1Department of Medicine, Hospital of the University of Pennsylvania, Philadelphia 19104.

The American Journal of Cardiology
|November 16, 1987
PubMed
Summary
This summary is machine-generated.

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Nitroglycerin (NTG) may not effectively shorten exertional angina episodes due to delayed effects. Continuous nitrate use causes tolerance, reducing effectiveness and potentially impacting angina prophylaxis strategies.

Area of Science:

  • Cardiology
  • Pharmacology

Background:

  • Traditional use of nitroglycerin (NTG) for chronic stable angina warrants reevaluation.
  • Sublingual NTG's hemodynamic effects onset around 90 seconds, potentially limiting its acute benefit for exertional angina.
  • Continuous nitrate administration leads to significant tolerance, diminishing antianginal efficacy.

Purpose of the Study:

  • To reconsider the conventional use of nitroglycerin in chronic stable angina.
  • To investigate the timing of nitroglycerin's effects and the development of tolerance.
  • To explore strategies for mitigating nitroglycerin tolerance.

Main Methods:

  • Analysis of studies on the onset of hemodynamic effects of sublingual nitroglycerin.
  • Evaluation of exercise testing data to determine angina duration and nitroglycerin's impact.

Related Experiment Videos

  • Review of evidence regarding continuous nitrate administration and tolerance development.

    • Main Results:

    • Sublingual nitroglycerin's onset of action may be too slow to significantly shorten typical exertional angina episodes.
    • Continuous nitrate administration via oral, transdermal, or intravenous routes results in tolerance.
    • Tolerance can diminish responsiveness to sublingual nitroglycerin and may affect antianginal effects differently at varying exercise intensities.

    Conclusions:

    • The efficacy of sublingual nitroglycerin for acute exertional angina relief is questionable in many patients.
    • Nitrate tolerance is a significant issue with continuous administration, impacting long-term angina management.
    • Strategies to avoid or reverse nitroglycerin tolerance are crucial for effective chronic stable angina treatment.