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All ECG 72

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Source: Learn the Heart

The rhythm is sinus tachycardia at about 100 beats per minute with a short PR interval and a delta wave, consistent with Wolff-Parkinson-White syndrome pre-excitation. The negative delta wave and QRS complex in V1 are consistent with “type B”.

Related: Wolff-Parkinson-White (WPW) Syndrome ECG Review