Fever is a common phenomenon in patients with acute myocardial infarction (AMI). These fevers often increase by more than 1°C, on average, as early as 4 to 8 hours after infarction onset, and they usually resolve by the fourth to fifth day.

Why does temperature rise after myocardial infarction?

Elevated body temperature may be a manifestation of the inflammatory reaction following myocardial necrosis. The inflammatory reaction has an adverse effect on left ventricular remodeling (15).

Does heart attack cause fever?

Many people who have experienced a heart attack thought they had the flu, since it accompanied flu-like symptoms before the attack. Except for high fever, symptoms can be similar such as chest fullness, shortness of breath, sweating, nausea, bloating and coughing.