Whereas the newer enzyme methods are still the subject of intense research, immediate echocardiography can be of great and rapid help in equivocal cases. Immobility of a discrete area of the ventricular wall may be present before clear ECG signs develop. Recently developed quantitative measures of wall-motion abnormality may also indicate the need for early titration of angiotensin-converting enzyme inhibitors. Finally, in shocked patients, the echocardiogram may reveal some unexpected complications.
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