Wiktionary
n. (context pathology English) angiopathy of the small blood vessels
Wikipedia
Microangiopathy (or microvascular disease, or small vessel disease) is an angiopathy (i.e. disease of blood vessels) affecting small blood vessels in the body. It can be contrasted to macroangiopathy, or large vessel disease.
The term cerebral small vessel disease refers to a group of diseases with different causes that affect the small arteries, arterioles, venules, and capillaries of the brain. Age-related and hypertension-related small vessel diseases and cerebral amyloid angiopathy are the most common forms.
Small vessel coronary disease is a type of coronary heart disease (CHD) that affects the heart's arterioles and capillaries. Small vessel coronary disease is also known as cardiac syndrome X, microvascular dysfunction, non-obstructive coronary disease, or microvascular angina.