Profuse sweating and fever
During an episode of myocardial infarction, it is common to have profuse sweating because the sympathetic nervous system activates and it starts sending an adrenal discharge throughout the body. This is similar to what happens when we are afraid or nervous, and the reason why we start sweating in these situations. Similarly, heart attack triggers the same reactions and patients often come drenched in their own sweat or wake up in the middle of the night in soaked sheets.
Fever is also common in heart attack, and it is often related to the increase of enzymes in the blood, especially the enzyme creatine kinase. This fever lasts no more than 48 hours, and it is always around 102°F.