BACKGROUND: We report on 4 @entity1 (aged 57 to 77 years; 3 @entity1 ) who developed drug-refractory, repetitive @entity1165 after @entity583 ( @entity583 ). All episodes of @entity943 were triggered by monomorphic ventricular premature beats (VPBs) with a @entity714 ( @entity714 ). METHODS AND RESULTS: Left ventricular (LV) mapping was performed to attempt radiofrequency (RF) ablation of the triggering VPBs. Activation mapping of the clinical VPBs demonstrated the earliest activation in the anteromedial LV in 1 @entity1 and in the inferomedial LV in 2 @entity1 . Short, high-frequency, low-amplitude potentials were recorded that preceded the onset of each extrasystole by a maximum of 126 to 160 ms. At the same site, a Purkinje potential was documented that preceded the onset of the QRS complex by 23 to 26 ms during sinus rhythm. In 1 @entity1 , only pace mapping was attempted to identify areas of interest in the LV. Six to 30 RF applications abolished all local Purkinje potentials at the site of earliest activation and/or perfect pace mapping and suppressed VPBs in all @entity1 . No episode of @entity2224 has recurred for 33, 14, 6, and 5 months in @entity1 1, 2, 3, and 4, respectively. CONCLUSIONS: Incessant @entity1165 after @entity583 may be triggered by VPBs. RF ablation of the triggering VPBs is feasible and can prevent drug-resistant electrical storm, even after acute @entity583 . Catheter ablation of the triggering VPBs may be used as a bailout therapy in these @entity1 .

Successful catheter ablation of electrical storm after XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'patient', 'men'] @entity1165 :: ('MESH:D017180', 'Disease') :: ['ventricular tachyarrhythmias'] @entity714 :: ('MESH:D002037', 'Disease') :: ['RBBB', 'right bundle-branch block morphology'] @entity2224 :: ('MESH:D014693', 'Disease') :: ['ventricular tachycardia or fibrillation'] @entity583 :: ('MESH:D009203', 'Disease') :: ['MI', 'acute myocardial infarction'] @entity943 :: ('MESH:D001145', 'Disease') :: ['ventricular arrhythmias']
@entity583 :: (MESH:D009203,Disease) :: ['myocardial infarction']
