Can you please describe the early signs and symptoms of having a heart attack?

MI: Heart attack sx can include: chest pain or tightness, shortness of breath, increased sweating pain or numbness radiating down the arm (more often left than right) and nausea. There could be pain in the upper back, head, jaw or teeth. One fourth of people have heart attacks without chest pain.

Variable: Symptoms: chest and neck and left arm pain can all occur elephant sitting on your chest shortness of breath fatigue anxiety fear some are asymptomatic signs: cold clammy low pulse rate, or fast irregular sudden death, .