4) Microvascular angina
Microvascular angina is a type of angina where the narrowing occurs in the small branches of the main coronary arteries -hence the prefix “micro”- rather than the primary arteries like the previous types. It is characterized by chest pain that usually lasts for longer compared to stable angina, and takes a longer time to be relieved after rest or nitrates intake. Microvascular angina is diagnosed by exclusion of the other types through investigations and follow-up.
