Cyanosis
In most cases, patients with myocardial infarction have something called peripheral cyanosis. Their extremities become pale and start turning to a blueish colour. This is especially prevalent in patients with circulation problems, as in advanced diabetes mellitus, Raynaud’s syndrome, among others. In these cases, there’s a constriction of the blood vessels in the extremities to favour blood flow to the heart, brain, and other key organs in the body. Thus, you may feel a weak pulse in your extremities as well. All of these signs should be examined by your doctor, and they would need a series of lab tests and physical evaluations to diagnose the root cause.