title: Unusual fascicular extrasystoles: where is the site of origin?
abstract: Radiofrequency ablation for symptomatic, drug refractory premature ventricular contractions has been well established as a treatment modality. Mapping of ventricular ectopy that arises near the native conduction system can be challenging. We report a case of fascicular ectopy arising from the proximal His (H)-Purkinje system that was successfully mapped and ablated. The use of surface and intracardiac electrograms and timing of the His bundle and/or Purkinje potentials is crucial in identifying the exact site of origin.
authors.affiliation: Cedars-Sinai Medical Center, The Heart Institute, 8700 Beverly Blvd, Suite 5539, Los Angeles, CA, USA.
authors.forename: Alicia
authors.initials: A
authors.lastname: Montanez
authors.forename: Michael
authors.initials: M
authors.lastname: Shehata
authors.forename: Timothy
authors.initials: T
authors.lastname: Yeh
authors.forename: Sumeet
authors.initials: S
authors.lastname: Chugh
authors.forename: Tong
authors.initials: T
authors.lastname: Liu
authors.forename: Xunzhang
authors.initials: X
authors.lastname: Wang
mesh_terms: D000200:Action Potentials / Q000502:physiology; D000368:Aged; D002036:Bundle of His / Q000503:physiopathology*; D017115:Catheter Ablation; D004562:Electrocardiography; D005260:Female; D006801:Humans; D011690:Purkinje Fibers / Q000503:physiopathology*; D018879:Ventricular Premature Complexes / Q000175:diagnosis / Q000503:physiopathology* / Q000601:surgery*