What are the symptoms of Acute coronary syndrome?
Call or other emergency services immediately if you have symptoms of acute coronary syndrome. These may include:

Chest pain or pressure, or a strange feeling in the chest.

Shortness of breath.

Sweating.

Lightheadedness or sudden weakness.

Nausea or vomiting.

A fast or irregular heartbeat.

Pain, pressure, or a strange feeling in the back, neck, jaw, or upper belly, or in one or both shoulders or arms.

After you call , the operator may tell you to chew 1 adult-strength or 2 to 4 low-dose aspirin. Wait for an ambulance. Do not try to drive yourself.