Angina Pectoris Is The Classical Medical Term For The Symptom That Occurs Due To Coronary Occlusion. The Characteristic Feature Of This Pain Is It Occurs Retrosternally With Typical Radiation To The Left Arm And Is Relieved With Medications. Angina Can Be Stable Or Unstable. Stable Angina Is Classically Described As Pain That Remains Stable For At Least 8 Weeks And Typically Occurs With Effort And Relieves With Rest Or Medications. Unstable Angina Is Described As New Onset Angina Or Angina That Occurs At Rest And There Is An Aggravation Of Symptom Class. Whatever May Be The Angina, It Needs Evaluation Or Advise From A Cardiologist. When Angina Occurs In The Setting Of Acute Myocardial Infarction (Mi) It Lasts More Than 30 Minutes And Is Not Relieved Till Any Form Of Intervention Is Undertaken. Patients Have A Feeling Of Impending Doom (Angor Animi) When Angina Occurs During St Elevation Mi. Immediate Advice From A Cardiologist/chest Physician Will Be The Need Of The Hour Then.