Heart attack patients may be asked to undergo a number of diagnostic tests and procedures. By learning what these tests are and why they're being done, you'll feel more confident. These tests are important and help the doctor determine if a heart attack occurred, how much your heart was damaged and also what degree of coronary artery disease (CAD) you may have. Your heart attack may have been the first symptom that you have CAD. The tests screen your heart and help the doctor determine what treatment and lifestyle changes will keep your heart healthy and prevent serious future medical events.

There are "non-invasive" and "invasive" diagnostic tests. Non-invasive tests don't involve inserting needles, instruments or fluids into the body. Invasive procedures can include a simple needle prick for a blood test or shot, insertion of a tube, device or scope and major surgeries such as open-heart surgery.

If you've had a heart attack, you may have already had certain procedures to help you survive your heart attack and diagnose your condition. For example, many heart attack patients have undergone thrombolysis, a procedure that involves injecting a clot-dissolving agent to restore blood flow in a coronary artery. This procedure is administered within a few (usually three) hours of a heart attack. If this treatment isn't done immediately after a heart attack, many patients will need to undergo coronary angioplasty or coronary artery bypass graft surgery (CABG) later to improve blood supply to the heart muscle.

Use the following At-A-Glance charts to gain a quick understanding of possible treatments that a heart attack patient may undergo.

• Cardiac Procedures and Surgeries At-A-Glance
• Implantable Medical Devices At-A-Glance
• Cardiac Medications At-A-Glance