The first QRS complex is narrow and supraventricular (*). It is followed by a rapid and irregular rhythm with a rate of up to 300 beats/min. The QRS complexes are unusual and show marked variability ...
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 ...
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