title: Sleeping with the fishes: electromagnetic interference causing an inappropriate implantable cardioverter defibrillator shock.
abstract: A 60-year-old man with a cardiac defibrillator implanted due to previous ventricular fibrillation arrest and ischaemic cardiomyopathy received a shock while cleaning his fish pond. At the time, his immersed arm was close to a submersed water pump, but the patient was asymptomatic. As a result of the shock he lost consciousness, but collapsed backwards, away from the pond. Interrogation of the device revealed a high-frequency artefact that was sensed by the device and triggered a shock. Device parameters were otherwise normal. Subsequently, the submersed water pump was found to be the source of an external alternating current leak and was identified as the likely cause of the inappropriate shock due to electromagnetic interference (EMI). Awareness of potential sources of EMI along with evaluation of data with a detailed clinical history is warranted in all cases.
authors.affiliation: Department of Medicine, Bedford Hospital, Bedford, UK.
authors.forename: Hui Min
authors.initials: HM
authors.lastname: Knight
authors.affiliation: Department of Cardiology, Bedford Hospital, Bedford, UK.
authors.forename: Holly Elizabeth
authors.initials: HE
authors.lastname: Cakebread
authors.affiliation: Department of Cardiology, Bedford Hospital, Bedford, UK.
authors.forename: Parag Ravindra
authors.initials: PR
authors.lastname: Gajendragadkar
authors.affiliation: Department of Cardiology, Bedford Hospital, Bedford, UK.
authors.forename: Rudolf Martin
authors.initials: RM
authors.lastname: Duehmke
mesh_terms: D017147:Defibrillators, Implantable / Q000009:adverse effects*; D004562:Electrocardiography; D055590:Electromagnetic Phenomena; D006801:Humans; D008297:Male; D008875:Middle Aged; D014693:Ventricular Fibrillation / Q000209:etiology / Q000503:physiopathology