The cause of his death was a heart attack. A heart attack occurs when the blood flow to the heart is blocked, usually by a blood clot. This blockage prevents oxygen from reaching the heart muscle, causing it to be damaged or die. Heart attacks can be caused by various factors such as high blood pressure, high cholesterol, smoking, obesity, and a sedentary lifestyle. The symptoms of a heart attack include chest pain, shortness of breath, nausea, and sweating. Immediate medical attention is crucial in order to prevent further damage and increase the chances of survival.