Acute coronary syndrome (ACS) is a syndrome (a set of signs and symptoms) due to decreased blood flow in the coronary arteries such that part of the heart muscle is unable to function properly or dies.

Anesthesiology is a medical specialty focused on providing pain relief, sedation, and overall care for patients undergoing surgeries or other medical procedures.

Cardiology is the branch of medicine that deals with the study, diagnosis, and treatment of disorders relating to the heart and the blood vessels.

Cardiothoracic surgery, also known as heart surgery, is a medical specialty focused on surgical procedures performed on the heart and the thoracic cavity (the chest area).

A computed tomography (CT) scan, also known as a CAT scan, is a medical imaging technique that uses x-rays and computer processing to create detailed cross-sectional images of the body.

The Wikipedia page "Doctor of Medicine" provides a comprehensive overview of the professional degree awarded to medical practitioners around the world.

An emergency department (ED), also known as an accident & emergency department (A&E), emergency room (ER), emergency ward (EW) or casualty department, is a medical treatment facility specializing in emergency medicine, the acute care of patients who present without prior appointment, either by their own means or by ambulance.