Table 1
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Definitions in accordance with current ESC guidelines

Premature ventricular complex (PVC): Premature occurrence of an abnormal QRS complex (duration typically ≥120 ms, corresponding T-wave typically broad and in the opposite direction of the major QRS deflection, no preceding P-wave).
Unifocal or monomorphic PVCs: PVCs with a single QRS morphology.
Multifocal, multiform, or polymorphic PVCs: PVCs with different QRS morphologies.
Short-coupled PVC: A PVC that interrupts the T-wave of the preceding conducted beat.
Ventricular tachycardia (VT): ≥ 3 consecutive beats with a rate.
Non-sustained ventricular tachycardia (NSVT): Run of consecutive ventricular beats persisting for 3 beats to 30 s.
Monomorphic ventricular tachycardia (MVT): Same QRS morphology from beat to beat.
Polymorphic ventricular tachycardia (PVT): Continually changing QRS morphology.
Sustained monomorphic/polymorphic ventricular tachycardia (SMVT/SPVT): Continuous VT for at least 30 s, or which requires an intervention for termination.
Ventricular fibrillation (VF): A chaotic rhythm with undulations that are irregular in timing and morphology, without discrete QRS complexes on the surface ECG.
Electrical storm: VA that occurs 3 or more times within 24 h (separated by at least 5 min), each requiring termination by an intervention.
Incessant VT: Continuous sustained VT that recurs promptly despite repeated intervention for termination over several hours.
Premature ventricular complex (PVC): Premature occurrence of an abnormal QRS complex (duration typically ≥120 ms, corresponding T-wave typically broad and in the opposite direction of the major QRS deflection, no preceding P-wave).
Unifocal or monomorphic PVCs: PVCs with a single QRS morphology.
Multifocal, multiform, or polymorphic PVCs: PVCs with different QRS morphologies.
Short-coupled PVC: A PVC that interrupts the T-wave of the preceding conducted beat.
Ventricular tachycardia (VT): ≥ 3 consecutive beats with a rate.
Non-sustained ventricular tachycardia (NSVT): Run of consecutive ventricular beats persisting for 3 beats to 30 s.
Monomorphic ventricular tachycardia (MVT): Same QRS morphology from beat to beat.
Polymorphic ventricular tachycardia (PVT): Continually changing QRS morphology.
Sustained monomorphic/polymorphic ventricular tachycardia (SMVT/SPVT): Continuous VT for at least 30 s, or which requires an intervention for termination.
Ventricular fibrillation (VF): A chaotic rhythm with undulations that are irregular in timing and morphology, without discrete QRS complexes on the surface ECG.
Electrical storm: VA that occurs 3 or more times within 24 h (separated by at least 5 min), each requiring termination by an intervention.
Incessant VT: Continuous sustained VT that recurs promptly despite repeated intervention for termination over several hours.
Table 1
Open in new tab

Definitions in accordance with current ESC guidelines

Premature ventricular complex (PVC): Premature occurrence of an abnormal QRS complex (duration typically ≥120 ms, corresponding T-wave typically broad and in the opposite direction of the major QRS deflection, no preceding P-wave).
Unifocal or monomorphic PVCs: PVCs with a single QRS morphology.
Multifocal, multiform, or polymorphic PVCs: PVCs with different QRS morphologies.
Short-coupled PVC: A PVC that interrupts the T-wave of the preceding conducted beat.
Ventricular tachycardia (VT): ≥ 3 consecutive beats with a rate.
Non-sustained ventricular tachycardia (NSVT): Run of consecutive ventricular beats persisting for 3 beats to 30 s.
Monomorphic ventricular tachycardia (MVT): Same QRS morphology from beat to beat.
Polymorphic ventricular tachycardia (PVT): Continually changing QRS morphology.
Sustained monomorphic/polymorphic ventricular tachycardia (SMVT/SPVT): Continuous VT for at least 30 s, or which requires an intervention for termination.
Ventricular fibrillation (VF): A chaotic rhythm with undulations that are irregular in timing and morphology, without discrete QRS complexes on the surface ECG.
Electrical storm: VA that occurs 3 or more times within 24 h (separated by at least 5 min), each requiring termination by an intervention.
Incessant VT: Continuous sustained VT that recurs promptly despite repeated intervention for termination over several hours.
Premature ventricular complex (PVC): Premature occurrence of an abnormal QRS complex (duration typically ≥120 ms, corresponding T-wave typically broad and in the opposite direction of the major QRS deflection, no preceding P-wave).
Unifocal or monomorphic PVCs: PVCs with a single QRS morphology.
Multifocal, multiform, or polymorphic PVCs: PVCs with different QRS morphologies.
Short-coupled PVC: A PVC that interrupts the T-wave of the preceding conducted beat.
Ventricular tachycardia (VT): ≥ 3 consecutive beats with a rate.
Non-sustained ventricular tachycardia (NSVT): Run of consecutive ventricular beats persisting for 3 beats to 30 s.
Monomorphic ventricular tachycardia (MVT): Same QRS morphology from beat to beat.
Polymorphic ventricular tachycardia (PVT): Continually changing QRS morphology.
Sustained monomorphic/polymorphic ventricular tachycardia (SMVT/SPVT): Continuous VT for at least 30 s, or which requires an intervention for termination.
Ventricular fibrillation (VF): A chaotic rhythm with undulations that are irregular in timing and morphology, without discrete QRS complexes on the surface ECG.
Electrical storm: VA that occurs 3 or more times within 24 h (separated by at least 5 min), each requiring termination by an intervention.
Incessant VT: Continuous sustained VT that recurs promptly despite repeated intervention for termination over several hours.
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