How are you? Diagnosis of heart attack is done with physical examination and diagnostic tests including EKG and blood tests. Other differentials including pulmonary, gastrointestinal and musculoskeletal causes should be ruled out. Lowering the risk factors for coronary artery disease (CAD) can help prevent a heart attack. Having a healthy lifestyle including following a low-fat diet rich in fruits and vegetables, lowering salt intake, losing weight, quitting smoking and doing physical activity to improve heart fitness may help. Have regular check-up with your attending physician for proper evaluation and monitoring. Take care and best regards.