What is the primary therapeutic use of aspirin in cardiovascular patients?

Aspirin is primarily used in cardiovascular patients as an antiplatelet agent, which means its main function is to inhibit the aggregation of platelets in the blood. This action is crucial in preventing the formation of blood clots that can lead to heart attacks or strokes. By reducing blood viscosity to some extent, aspirin enhances blood flow and decreases the likelihood of clot formation, particularly in patients with a history of cardiovascular events or at high risk.

The other options focus on different therapeutic targets that aspirin does not directly address. Lowering blood pressure is typically managed with antihypertensive medications rather than aspirin. Preventing arrhythmias involves antiarrhythmic medications, while managing blood sugar levels is primarily related to the use of insulin or oral hypoglycemic agents in diabetic patients. Thus, the unique role of aspirin in preventing thrombotic events distinguishes it in the management of cardiovascular disease.