NCIt definition : A disorder characterized by an electrocardiographic finding of three or more consecutive
complexes of ventricular origin with a rate greater than a certain threshold (100
or 120 beats per minute are commonly used). The QRS complexes are wide and have an
abnormal morphology. (CDISC);
Alternative definition : NICHD: A tachycardia originating in the ventricles of the heart.; CTCAE: A disorder characterized by a dysrhythmia with a heart rate greater than 100
beats per minute that originates distal to the bundle of His.;