Unusual fascicular extrasystoles: where is the site of origin?
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.
Montanez
Alicia
A
Cedars-Sinai Medical Center, The Heart Institute, 8700 Beverly Blvd, Suite 5539, Los Angeles, CA, USA.
Shehata
Michael
M
Yeh
Timothy
T
Chugh
Sumeet
S
Liu
Tong
T
Wang
Xunzhang
X
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*