Rivaroxaban is used in the treatment of which cardiovascular condition?

Rivaroxaban is an oral anticoagulant that plays a crucial role in managing atrial fibrillation, particularly in reducing the risk of stroke and systemic embolism in patients with this condition. Atrial fibrillation is characterized by irregular and often rapid heart rate, which can lead to the formation of blood clots in the heart. These clots can dislodge and travel to the brain, resulting in a stroke.

By inhibiting Factor Xa, an essential component of the coagulation cascade, rivaroxaban effectively decreases the likelihood of clot formation, making it an important treatment option for individuals with atrial fibrillation. This is why it is the correct answer for the cardiovascular condition specified in the question.

In contrast, hypertension, aortic stenosis, and heart murmurs do not primarily involve the prevention of thromboembolism and are not indications for rivaroxaban use. Hypertension is a chronic condition managed with antihypertensive agents, aortic stenosis affects valve function and may require surgical intervention, and heart murmurs are typically assessments of underlying heart conditions rather than specific indications for anticoagulant therapy.