ventricular tachycardia polymorphic ventricular tachycardia A ventricular tachycardia that is irregular in rate and rhythm. NCIT:C111648 SCTID:251159007 MONDO:0020575 UMLS:C0344432 MEDGEN:138002 icd11.foundation:16452928 HP:0031677 ventricular tachycardia, polymorphic polymorphic ventricular tachycardia