Calcium channel blockers are primarily used to treat which condition?

Calcium channel blockers are primarily used to treat chronic stable angina because they work by relaxing the smooth muscles of the coronary arteries, thereby increasing blood flow to the heart muscle. This action helps to relieve the symptoms of angina, which is characterized by chest pain caused by reduced blood flow to the heart. By decreasing the workload on the heart and lowering myocardial oxygen demand, these medications effectively alleviate the pain associated with chronic stable angina.

In the context of the condition, calcium channel blockers are advantageous as they not only reduce the frequency and severity of anginal attacks but also improve exercise tolerance in patients. This makes them a preferred option in managing chronic stable angina, particularly when lifestyle changes and other medications, such as nitrates or beta-blockers, are insufficient alone.

While calcium channel blockers can be used in other conditions, such as controlling certain types of arrhythmias or managing hypertension, their most significant and established role in clinical practice is in the relief of chronic stable angina.