This ECG (Figure 1), recorded in the emergency room, shows a wide complex tachycardia at 205 bpm. Wide complex tachycardias are more likely to be ventricular tachycardia (VT) than supraventricular ...

Upon review of this body and the described ECG findings ... use reported widened QRS-complex widths at rates ranging from 0 to 6%, although one study reported wide QRS complexes in 38%.