Which of the following best describes the function of anti-anginals?

The function of anti-anginals is best described as dilating the coronary arteries to enhance blood supply. This is crucial for individuals experiencing angina pectoris, which is characterized by chest pain due to insufficient blood flow to the heart muscle. Anti-anginal medications work by relaxing the smooth muscles in the walls of the coronary arteries, leading to vasodilation. This dilation improves blood flow and oxygen delivery to the heart, thus alleviating chest pain and reducing the workload on the heart.

In this context, enhancing blood supply is vital for patients with coronary artery disease or other heart conditions, as it directly addresses the underlying issue of reduced oxygen supply that causes angina.