Real or fake?

Take a look at this EKG. Is the ventricular tachycardia real or fake?

Click image to enlarge. Scroll down for answer.

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Fake. Note the QRS complexes marching through the psuedoventricular tachycardia. This pseudoventricular tachycardia was caused by the patient's tremor from Parkinson's disease.

Source

LLinas, R. MD and Henderson, G. MD. "Tremor as a Cause of Pseudo-Ventricular Tachycardia." NEJM. 21 Oct 1999.