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The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
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Prevention of embolic complications in nonvalvular atrial fibrillation in the elderly

F R Lake1, P L Thompson

  • 1National Jewish Center for Immunology and Respiratory Medicine, Denver, Colorado.

Drugs & Aging
|November 1, 1991
PubMed

Insights

Prophylactic anticoagulation significantly reduces stroke risk in elderly patients with nonvalvular atrial fibrillation. Long-term therapy is recommended indefinitely for stroke prevention, pending further research on optimal duration and patient subgroups.

Area of Science:

  • Cardiology
  • Geriatrics
  • Neurology

Background:

  • Atrial fibrillation is prevalent in the elderly, often coexisting with heart disease.
  • Nonvalvular atrial fibrillation elevates morbidity and mortality, primarily from embolic events like stroke.
  • It increases stroke risk by 5.6-fold compared to age-matched individuals.

Purpose of the Study:

  • To evaluate the efficacy of prophylactic anticoagulation in reducing stroke risk.
  • To assess the safety and benefits of anticoagulation versus aspirin in elderly patients.
  • To identify predictors of embolic risk and determine optimal long-term management strategies.

Main Methods:

  • Review of three recent clinical trials on prophylactic anticoagulation.
  • Comparison of outcomes between anticoagulation (full/partial) and aspirin.
  • Analysis of stroke risk factors and complication rates.

Main Results:

  • Prophylactic anticoagulation, both full and partial, significantly lowers stroke rates.
  • Aspirin prophylaxis shows unclear benefits, with no proven effect in the elderly.
  • Current methods cannot reliably predict embolic risk beyond previous embolism.

Conclusions:

  • All nonvalvular atrial fibrillation patients warrant consideration for prophylactic anticoagulants.
  • Therapy should generally be continued indefinitely due to persistent stroke risk.
  • Further research is needed to refine risk stratification and optimize anticoagulation strategies.

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