This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'EKG finding of ventricular premature beats- \nSelect and explain. \nA. Fusion beat, B. Narrow QRS complex, C. AV Dissociation, D. Wide QRS complex', 'role': 'user'}, {'content': 'Answer: D \nExplanation: PVCs are characterized by premature and bizarrely shaped QRS complexes that are unusually long (typically >120 msec) and appear wide on the electrocardiogram (ECG). These complexes are not preceded by a P wave, and the T wave is usually large and oriented in a direction opposite the major deflection of the QRS. pvc is followed by a compensatory pause Ref Harrison 20th edition pg 1435', 'role': 'assistant'}]