This rhythm strip was taken from a 41-year-old male with lymphoma. He had a 5-day history of substernal chest pain, which was increased by lying down and decreased by sitting up and leaning forward.

We have had several cases in which the presenting rhythm was either unavailable or not communicated to hospital providers. In one case, a 25-year-old patient with a reported pulseless, wide-complex ...

Lead II is frequently unrepresentative of QRS configurations, especially for arrhythmias. Here, there is atrial bigeminy due to premature atrial complexes. Although the last QRS in lead II is slightly ...

Is there a simple way to differentiate a supraventricular tachycardia from a ventricular, wide QRS tachycardia on a rhythm strip? The simplest initial approach is to look at the lead with the most ...

There are only a few sinus rhythm QRS complexes available to examine on this ECG. Using lead V1 an incomplete right bundle branch block is seen. A prolonged QT interval is present that extends all the ...