Though mortality rate in patients with inferior MI is lower than that with anterior MI, thrombolytic therapy is beneficial to decrease the mortality rate in some situations in which a large are of myocardial tissue is jeopardized, namely in the following situations: Precordial ST depression, right ventricular infarction, hypotension, complete heart block. Additionaly, of the patient comes to the hospital very early (in 3 hours) or has a previous anterior MI and if ST segment elevations are seen in more than three ECG derivations, thrombolytic therapy can be given as it may be considered that a large myocardial region usually is in jeopardy. If here is no precordial ST depression, the benefit of thrombolytic therapy is not clear. Therefore, precordial ST depression can be accepted as a good marker to stratify the patients with inferior MI eligible for thrombolytic therapy. The benefit of reperfusion therapy is reduced in inferior MI with small infarct-related artery perfusion territory and that exhibiting no precordial ST depression.
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