Source:http://linkedlifedata.com/resource/umls/id/C0344432
NCI: A ventricular tachycardia in which the ventricular activation sequence is variable. The morphology of the electrocardiographic waveform is variable and is referred to as polymorphic.,NCI: A ventricular tachycardia in which the ventricular activation sequence is variable. The morphology of the electrocardiographic waveform is variable and is referred to as polymorphic. (NCI)