Ventricular arrhythmias can be classified by their frequency and form. This can be used for descriptive and prognostic purposes.
rare (< 1 VPC per hour)
infrequent (1-9 VPCs per hour)
intermediate (10-29 VPC per hour)
frequent (>= 30 VPCs per hour)
• VPC = ventricular premature contraction
uniform morphology, unifocal
repetitive forms in couplets or salvos (3-5 consecutive ventricular complexes)
nonsustained ventricular tachycardia ( >= 6 consecutive ventricular complexes, to runs <= 30 seconds)
sustained ventricular tachycardia ( runs of ventricular complexes > 30 seconds)
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