When the blood flow to the heart is reduced as a result of blockage in the coronary arteries or their branches, causing chest pain, shortness of breath, and a feeling of doom, the patient is most likely having a heart attack, also known as a(n) ________, and should call 911 immediately.

Coronary Arteries

The arteries that supply blood to the heart muscle, crucial for providing the necessary oxygen and nutrients.

Chest Pain

A symptom that can be caused by a variety of conditions, ranging from heart-related issues to digestive problems, requiring immediate medical evaluation in serious cases.

Shortness of Breath

A feeling of not being able to breathe well enough, which can be a sign of various medical conditions, including heart and lung issues.