Fig 27.b

WPW ‘A’ in another patient, with intermittent anomalous conduction favoured by the fast phase of sinus arrhythmia. Again, what looks like a normal PR interval in lead 1 is refuted by the synchronous leads 2 and 3 below.

WPW ‘A’ in another patient, with intermittent anomalous conduction favoured by the fast phase of sinus arrhythmia. Again, what looks like a normal PR interval in lead 1 is refuted by the synchronous leads 2 and 3 below.