Prinzmetal's angina, also known as variant angina, refers to a type of chest pain or discomfort that occurs due to the sudden constriction of certain coronary arteries. Besides Prinzmetal's angina, this condition can also be referred to as coronary artery vasospasm. The constriction of these arteries affects the supply of oxygen and blood to the heart muscles, triggering symptoms that may resemble a heart attack. Other potential synonyms of Prinzmetal's angina include vasospastic angina, episodic angina, and angina inversa. The condition is often triggered by stress or exposure to cold, and while it is rare, it can have serious consequences.