Conventional activation or pacemapping is effective in guiding ablation of @entity1165 originating from right ventricular outflow tract (RVOT). However, in selected @entity1 with hemodynamically unstable or nonsustained @entity591 , noncontact mapping may be an effective alternative method to guide ablation in RVOT. Five @entity1 with symptomatic @entity551 during @entity1165 ( @entity1165 ) or nonsustained @entity591 originating from the RVOT had radiofrequency ablation guided by noncontact mapping. All @entity1 had a history of @entity1163 and the @entity591 were refractory to antiarrhythmic therapy. Four @entity1 had spontaneous sustained @entity1165 of a cycle length from 250 to 300 ms and one had symptomatic @entity1540 . Two @entity1 were diagnosed to have @entity4128 ( @entity4128 ). @entity1165 with @entity551 was induced in two @entity1 and nonsustained @entity1165 in three @entity1 . Isopotential color maps were used to locate the earliest activation site of the @entity591 in RVOT. Three @entity1 had @entity591 exit sites at the septal region and two at lateral region of RVOT. Low voltage area and diastolic activity were detected in the two @entity1 with @entity4128 . Radiofrequency ablation guided by noncontact mapping was performed during sinus rhythm in all @entity1 . The number of ablation attempts ranged from 1 to 14. After follow-up for 12 +/- 5.8 months, there was no recurrence of @entity591 and @entity1163 in all five @entity1 . Noncontact mapping is a safe and effective alternative method to guide ablation of hemodynamically unstable or nonsustained @entity943 originating from RVOT.

Ablation of nonsustained or hemodynamically unstable XXXX originating from the right ventricular outflow tract guided by noncontact mapping.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity4128 :: ('MESH:D019571', 'Disease') :: ['arrhythmogenic right ventricular cardiomyopathy', 'ARVC'] @entity1165 :: ('MESH:D017180', 'Disease') :: ['Sustained VT', 'VT', 'ventricular tachycardia', 'ventricular tachyarrhythmia'] @entity943 :: ('MESH:D001145', 'Disease') :: ['ventricular arrhythmia'] @entity1163 :: ('MESH:D013575', 'Disease') :: ['syncope'] @entity591 :: ('MESH:D013610', 'Disease') :: ['tachyarrhythmia', 'tachycardia', 'tachyarrhythmias'] @entity1540 :: ('MESH:D018879', 'Disease') :: ['ventricular ectopic beats'] @entity551 :: ('MESH:D007022', 'Disease') :: ['hypotension']
@entity943 :: (MESH:D001145,Disease) :: ['ventricular arrhythmia']
