Ka. Gatzoulis et al., POLYMORPHIC VENTRICULAR-TACHYCARDIA INDUCED DURING TILT-TABLE TESTINGIN A PATIENT WITH SYNCOPE AND PROBABLE DYSFUNCTION OF THE SINUS NODE, PACE, 18(5), 1995, pp. 1075-1079
We present a case of life-threatening arrhythmia occurring during tilt
table testing in a 44-year-old man with syncope. Polymorphic ventricu
lar tachycardia occurred while the patient was tilted up under the int
ravenous infusion of isoproterenol (2 mu g/min). No ischemia, QTc prol
ongation, or electrolyte abnormality preceded this event. The arrhythm
ia was not induced by programmed ventricular stimulation or exercise t
esting. Based on electrophysiological and clinical data, the diagnosis
of sick sinus syndrome was entertained.