My husband had his annual check up at 9:45, came home and 3-4 hours later died of coronary trombosis and hypertensive artherosclerosis cardiovascular disease. He was on medication for high blood pressure and his doctor knew that he also had high cholesterol. His doctor did not perform any stress test and he did not reccomended any angiograms or send him to see a cardiologist. That morning his blood pressure was 140/100 and doctor changed his high blood pressure medication and send him home.Is it possible that EKG did not show anything that morning? Is this a negligence? He was 48.