The initial part of the ECG shows a regular rhythm at a rate of 140 beats/min, with an abrupt slowing to rates ranging from 50 to 68 beats/min. All of the QRS complexes are identical, with a normal ...
At quick glance, this looks like an electrical alternans. But careful examination, especially of V4, shows that every other beat has a shorter PR interval and a slurred upstroke (delta wave), ...
2. Short PR interval and delta waves consistent with Wolff-Parkinson-White (WPW) syndrome Explanation: Wolff-Parkinson-White syndrome occurs when a person is born with an "accessory pathway" that can ...
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