Unstable Angina (aka: Rest Angina Pectoris or Rest Angina) is one of the ischemic (coronary) heart disease forms which is characterized by severe attacks of chest pain occurring while a person is at rest and not depending on any exercise stress. This is a dangerous syndrome which signifies the progression of ischemic heart disease.
There are two separate variants of Rest Angina:
- Post-infarction Angina - develops within 10-14 days after a myocardial infarction attack;
- Prinzmetal’s Angina, or variant Angina - caused by sudden spasms of coronary arteries.
As the condition progresses there are:
- Subacuterest Angina – if Rest Angina episodes occur during the last month;
- Acute Rest Angina – if Rest Angina episodes occur during the last 48 hours.