Coronary small vessel disease (CSVD), also known as microvascular angina or microvascular coronary disease, is a condition that affects the heart's tiniest arteries. Unlike traditional coronary artery disease), which involves blockages in the larger arteries of the heart, CSVD involves dysfunction in the small vessels that supply blood to the heart muscle. This condition can lead to chest pain (angina), shortness of breath, and other symptoms that resemble those of traditional coronary artery disease. Women are most often affected by this disease.