What is typically the most common symptom of myocardial ischemia and infarction?

Retrosternal chest pain is typically the most common symptom of myocardial ischemia and infarction because this pain is often described as a pressure or squeezing sensation that may radiate to the shoulders, neck, arms, back, teeth, or jaw. This symptom arises from the heart muscle's response to inadequate blood supply, which can occur due to coronary artery blockage or spasm. The sensation is often significant enough to prompt individuals to seek emergency medical assistance.

While shortness of breath, nausea, and dizziness can accompany a heart attack or ischemia, they are usually considered secondary symptoms. Many patients report the classic chest pain first, and the other symptoms arise as adjunct manifestations of the body's stress response or due to the heart's decreased function. Understanding this symptom enhances the ability to recognize and respond to potential cardiac emergencies quickly.