Which of the following is NOT a common characteristic of a premature ventricular complex (PVC)?
a. No P wave prior to the QRS complex
b. Widened QRS complex
c. Bizarre QRS complex
d. Narrow QRS complex
ANS: D
PVCs are easy to recognize because they cause a unique and bizarre QRS complex, which is much wider than normal (Figure 18-16). The QRS complex of a PVC is wider than normal, be-cause the ectopic focus is using channels outside the normal conduction system to move the im-pulse throughout the myocardium. PVCs have no P wave preceding them and may occur as a singular event or, more commonly, as a temporary run of PVCs.
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