A new-onset MI can be recognized by which of the following ECG changes?

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Any change from baseline is expressed in millimeters and may indicate myocardial ischemia (one small box equals 1 mm).ST segment elevation of 1 to 2 mm is associated with acute myocardial injury, preinfarction, and pericarditis.ST segment depression (decrease from baseline more of 1 to 2 mm)is associated with myocardial ischemia.Widened QRS complexes are indicative of ventricular depolarization abnormalities such as bundle branch blocks and ventricular dysrhythmias.Q waves and smaller R waves are indications usually present 24 hours to 1 week after the myocardial infarction is completely evolved; they represent necrosis.

A New-Onset MI Can Be Recognized by Which of the Following