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Related Experiment Videos

Bronchodilators and acute cardiac death

S Suissa1, B Hemmelgarn, L Blais

  • 1McGill Pharmacoepidemiology Research Unit, Department of Medicine, Royal Victoria Hospital, Montréal, Québec, Canada.

American Journal of Respiratory and Critical Care Medicine
|December 1, 1996
PubMed
Summary

Theophylline and oral or nebulized beta-agonists are linked to increased cardiovascular death risk in asthma patients. Metered-dose inhaler beta-agonists showed no such association, suggesting safer use in cardiac patients.

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Area of Science:

  • Cardiology
  • Pulmonology
  • Pharmacology

Background:

  • Bronchodilators are crucial for airway diseases but can cause cardiac side effects.
  • Life-threatening cardiac events like arrhythmias and arrest are potential risks.

Purpose of the Study:

  • To investigate the association between theophylline, beta-agonists, and cardiovascular mortality.
  • To compare risks among different beta-agonist administration methods.

Main Methods:

  • Population-based cohort study of 12,301 subjects (ages 5-54) using health insurance data (1978-1987).
  • Identified 30 cardiovascular deaths not linked to asthma.
  • Compared drug dispensing (theophylline, beta-agonists, cardiac drugs) before death to 4,080 person-time controls.

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Main Results:

  • Theophylline use was associated with increased cardiovascular death (RR=2.7).
  • Oral or nebulized beta-agonists showed increased cardiovascular death risk (RR=2.4).
  • Metered-dose inhaler (MDI) beta-agonists were not associated with increased cardiovascular death risk (RR=1.2).

Conclusions:

  • Theophylline and oral/nebulized beta-agonists should be avoided in patients with significant cardiac disease.
  • MDIs may be a safer alternative for beta-agonist delivery in at-risk cardiac patients.
  • Most cardiovascular deaths occurred in patients with pre-existing severe cardiac conditions.