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All ECG 146

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Source: Learn the Heart

This ECG shows normal sinus rhythm. There are small narrow Q waves in II-III-AVF that do not fulfill the criteria for “pathologic” Q waves (> 0.2 second or > 5 mV). The QTc (Fridericia’s formula) is about 400 msec. The P wave duration is slightly prolonged at 0.12 sec, consistent with left atrial abnormality.

Related: Left Atrial Enlargement (LAE) ECG Review