Oral anticoagulation in elderly adults with atrial fibrillation: integrating new options with old concepts

Ignatius Gerardo E Zarraga1, Jack Kron

  • 1Division of Cardiology, Portland Veterans Affairs Medical Center, Portland, Oregon 97239, USA. Ignatius.Zarraga@va.gov

Insights

Oral anticoagulation is crucial for preventing stroke in elderly patients with atrial fibrillation (AF). This review addresses barriers to its use, including bleeding risks and physician perceptions, to improve treatment strategies.

Area of Science:

  • Cardiology
  • Geriatrics
  • Pharmacology

Background:

  • Atrial fibrillation (AF) is a common cardiac arrhythmia, particularly in the elderly, and a significant stroke risk factor.
  • Oral anticoagulation effectively prevents thromboembolic events but faces underuse challenges in older adults.
  • Addressing these challenges is vital for optimizing stroke prevention in the elderly AF population.

Purpose of the Study:

  • To synthesize current literature on anticoagulation in elderly adults with AF.
  • To identify and address barriers to oral anticoagulation therapy in this demographic.
  • To review risk stratification schemes and available antithrombotic therapies for AF.

Main Methods:

  • Comprehensive PubMed literature search (1990-2012) using keywords: atrial fibrillation, elderly, antiplatelet, anticoagulation, stroke, bleeding, hemorrhage, falls.
  • Manual bibliography search of retrieved articles.
  • Synthesis of data to address key clinical questions.

Main Results:

  • Underuse of oral anticoagulation in elderly AF patients is linked to complex issues including fall risk, warfarin responsiveness, and physician-perceived risks.
  • Risk-stratification schemes for stroke and hemorrhage can refine antithrombotic therapy selection.
  • Data on antiplatelet, warfarin, and novel oral anticoagulant use in AF are summarized.

Conclusions:

  • Optimizing anticoagulation in elderly patients with AF requires addressing specific barriers and utilizing refined risk assessment tools.
  • Understanding physician perceptions and patient-specific risks is crucial for effective treatment.
  • Current evidence supports various antithrombotic options, including new oral anticoagulants, for AF management.

Related Concept Videos

Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants01:18

Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants

Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Venous Thrombosis III: Interprofessional Care01:29

Venous Thrombosis III: Interprofessional Care

Venous thrombosis requires effective prevention and treatment strategies to improve patient outcomes and reduce potential complications.Prevention StrategiesHealthcare providers must prioritize preventing venous thromboembolism (VTE) for all adult patients upon admission. Interventions depend on bleeding and thrombosis risk, medical history, current medications, diagnoses, planned procedures, and patient preferences. Patients on bed rest should change positions every two hours and, if not...
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
Drug Dosing: Geriatric Patients01:15

Drug Dosing: Geriatric Patients

Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

Drug distribution in the human body is influenced by several factors, including plasma protein concentration, body composition, blood flow, tissue-protein concentration, and tissue fluid pH. Among these, changes in plasma protein concentration and body composition due to aging significantly affect how drugs are distributed within the body. Specifically, aging is associated with a decrease in albumin levels by about 10% and an increase in α1-acid glycoprotein levels. These alterations are not...