Ventricular Tachycardia - EKG Reference Caliper Time Interval: ___ seconds Key Features RhythmRegular RateFast (100-250 bpm) P WaveAbsent PR IntervalNot measurable QRSWide (>0.10 sec), bizarre appearance Notes Ventricular Tachycardia EKG Reference Definition of Ventricular Tachycardia Ventricular tachycardia (VT) is a cardiac arrhythmia characterized by a pulse rate of more than 100 beats per minute, with at least three irregular heartbeats in a row. The electrical signals causing this rapid beating originate in the ventricles. This is a very serious arrhythmia as it may lead to life threatening conditions such as ventricular fibrillation, asystole and sudden death. Types of Ventricular Tachycardia Monomorphic ventricular tachycardia Polymorphic ventricular tachycardia Torsades de pointe Symptoms Symptoms may include: Chest discomfort (angina) Fainting (syncope) Light-headedness or dizziness Palpitations Shortness of breath Quick Links Sinus Atrial Junctional Ventricular Atrioventricular Pacemaker All EKG Monitor Quiz New EKG Monitor Quiz. Medical terms Free medical terminology flash cards.