Abstract:Aim. The diagnosis of previous myocardial infarction (MI) is difficult in patients with pacemaker and usually further tests must be done to confirm the diagnosis. To overcome this difficulty five major ECG criteria have been proposed by authors: 1. Notching 0.04 second in the ascending limb of the S wave of leads V3,4 or 5 (Cabrera's sign), 2. Notching of the upstroke of the R wave in leads I, aVL or V6 (Chapman's sign), 3. Q wave >0.03 second in leads I, aVL or V6, 4. Notching of the first 0.04 second of the … Show more
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