doc_clotaire wrote:
Answer:

(D) Aspirin (325 mg) daily

Explanation:

This is a young patient who has an episode of atrial fibrillation in
the absence of other preexisting conditions. The American College of
Chest Physicians has established guidelines for anticoagulation in
nonrheumatic atrial fibrillation. Patients with risk factors for the
formation of thrombi such as a previous stroke, transient ischemic
attack, systemic thromboembolism, left ventricular dysfunction, recent
congestive heart failure, systemic hypertension, or diabetes should be
placed on warfarin to an INR of 2 to 3. Patients with no risk factors
who are younger than 65 years are considered to be low risk and should
take one aspirin daily. Aspirin is also suitable for patients with a
contraindication to warfarin therapy. The efficacy of other
antiplatelet agents has not been proven in patients with atrial
fibrillation