The exact reentrant circuit of the @entity1855 -sensitive idiopathic left VT with a RBBB configuration remains unclear. Furthermore, if the fascicle of left bundle branch is involved in the reentrant circuit has not been well studied. Forty-nine @entity1 with @entity1855 -sensitive idiopathic left VT underwent electrophysiological study and RF catheter ablation. Group I included 11 @entity1 (10 @entity1 , 1 @entity1 ; mean age 25 +/- 8 years) with @entity714 (4 @entity1 ), or @entity714 (7 @entity1 ) during sinus rhythm. Group II included 38 @entity1 (29 @entity1 , 9 @entity1 ; mean age 35 +/- 16 years) without @entity714 during sinus rhythm. Duration of QRS complex during sinus rhythm before RF catheter ablation in group I @entity1 was significant longer than that of group II @entity1 (104 +/- 12 vs 95 +/- 11 ms, respectively, P=0.02). Duration of QRS complex during VT was similar between group I and group II @entity1 (141 +/- 13 vs 140 +/- 14 ms, respectively, P=0.78). Transitional zones of QRS complexes in the precordial leads during VT were similar between group I and group II @entity1 . After ablation, the QRS duration did not prolong in group I or group II @entity1 (104 +/- 11 vs 95 +/- 10 ms, P=0.02); @entity714 did not occur in group II @entity1 . Duration and transitional zone of QRS complex during VT were similar between the two groups, and new @entity714 did not occur after ablation. These findings suggest the fascicle of left bundle branch may be not involved in the antegrade limb of reentry circuit in idiopathic left VT.

Is the fascicle of left bundle branch involved in the reentrant circuit of XXXX -sensitive idiopathic left ventricular tachycardia?

@entity1 :: ('9606', 'Species') :: ['men', 'women', 'woman', 'patients'] @entity1855 :: ('MESH:D014700', 'Chemical') :: ['verapamil'] @entity714 :: ('MESH:D002037', 'Disease') :: ['fascicular block', 'left posterior fascicular block', 'left anterior fascicular block']
@entity1855 :: (MESH:D014700,Chemical) :: ['verapamil']
