What confirms myocardial infarction?

Toponins,clinic,wall. Acute cardiogenic shock, .Ventricular arrythmias, infarct syndrome, flash pulmonary edema, wall motion abnormalities, syncope, presyncope, cardiac arrest, . It takes 4 hours for troponins to elevate after the infarct begins. That is why clinical symptoms dictate emergent coronary interventions. Troponins may still be normal within minutes of a life threatening myocardial infarct.
Testing. History can be suggestive but : ekg changes( st elevation) nonstemi blood tests showing escaping enzymes from damaged cells later ekg showing scar echo showing damage.
Many ways. Depending on the situation, the doctor may use many tests. History, physical exam, ekg to measure electrical activity of the heart, blood tests to look for proteins released by dead heart muscle, imaging studies to look at wall motion or perfusion of the muscle, angiogram to determine blood vessel patience.
Nuclear stress test. A myocardial perfusion spect study (nuclear stress test) will show decreased tracer uptake on both rest and stress images (fixed defect) if there is an infarct. In addition, wall motion abnormality is also seen in the region of the infarct.

Related Questions

Myocardial infarction causes?

Many poss causes. Almost all heart attacks are the result of fatty deposits on the inside of arteries that break open and cause clotting which will blocks the artery (and the blood from flowing to the part of the heart the artery feeds). Family history, fatty diet, smoking, high blood pressure, diabetes and other disorders can all contribute to this process. Read more...
Heart cell death. Myocardial infractions happen when heart muscle dies from lack of oxygen delivered by blood. This can happen when plaque deposits in the vessels rupture and cause total blockage of a vessel. It can also happen if there is a narrowing of the vessel severe enough that oxygen delivery is far below demand (especially if oxygen demand is increased). Read more...

What exactly is myocardial infarction?

Loss of oxygen. The heart muscle loses its supply of oxygen from the coronary arteries. By losing the oxygen, the heart muscle can't continue to function and dies unless the blood flow is restored quickly enough (under 6 hours). Read more...