title: Aspirated air in the pericardial space during epicardial catheterization may elevate the defibrillation threshold.
abstract: A 79-year-old woman without structural heart disease underwent catheter ablation of ventricular tachycardia. Successful ablation was achieved on the left ventricular epicardium using an epicardial approach via pericardial puncture. Thereafter, programmed stimulation induced ventricular fibrillation (VF). A 360 J biphasic extrathoracic cardioversion using cutaneous pads in the conventional sternal-apical position failed to terminate the VF. After repositioning the sternal pad more laterally, the 360 J biphasic shock terminated the VF. Fluoroscopic imaging revealed aspirated air in the pericardial space, mainly apically. In this case, air aspirated into the pericardial space during the epicardial approach might have elevated the defibrillation threshold.
authors.forename: Takumi
authors.initials: T
authors.lastname: Yamada
authors.forename: H Thomas
authors.initials: HT
authors.lastname: McElderry
authors.forename: Michael
authors.initials: M
authors.lastname: Platonov
authors.forename: Harish
authors.initials: H
authors.lastname: Doppalapudi
authors.forename: G Neal
authors.initials: GN
authors.lastname: Kay
mesh_terms: D000368:Aged; D017115:Catheter Ablation / Q000009:adverse effects*; D004554:Electric Countershock; D017097:Electric Impedance; D005260:Female; D006801:Humans; D011026:Pneumopericardium / Q000150:complications* / Q000209:etiology; D017180:Tachycardia, Ventricular / Q000150:complications / Q000601:surgery* / Q000628:therapy; D014693:Ventricular Fibrillation / Q000628:therapy*