Heart attacks are also reported as spiking in the early morning hours, particularly between 6 a.m. and noon. Theoretically, these spikes may be due to the release of cortisol upon waking, the ...

A heart attack, also known as myocardial infarction, occurs when blood flow to a portion of the heart suddenly gets blocked, typically by a clot in a coronary artery. Without oxygen-rich blood ...

While heart attacks can happen suddenly, sometimes symptoms present themselves weeks ahead of the cardiac event itself. Unusual fatigue, sudden shortness of breath, any chest discomfort, new sleep ...