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dc.contributor.authorBilanovic, Ana
dc.contributor.authorIrvine, Jane
dc.contributor.authorKovacs, Adrienne H.
dc.contributor.authorHill, Ann
dc.contributor.authorCameron, Doug
dc.date.accessioned2014-10-16T15:17:24Z
dc.date.available2014-10-16T15:17:24Z
dc.date.issued2013-06
dc.identifier.citationBilanovic, A., Irvine, J., Kovacs, A., Hill, A., Cameron, D., & Katz, J. (2013). Uncovering phantom shocks in cardiac patients with an implantable cardioverter defibrillator. Pacing and Clinical Electrophysiology, 36(6), 673-83. doi: 10.1111/pace.12116
dc.identifier.issnISSN: 0147-8389, ESSN: 1540-8159
dc.identifier.urihttp://hdl.handle.net/10315/27974
dc.description.abstractBackground: Implantable cardioverter defibrillator recipients sometimes report “phantom shocks” (PSs), defined as a reported shock lacking objective evidence. The aim of this study was to describe the subjective experience of PSs and their psychosocial correlates using a mixed methods approach. Methods: PS participants were matched on sex and age with individuals who received objective shocks only (OSO). Participants were interviewed and completed measures of posttraumatic stress disorder (PTSD Checklist—Civilian Version), depression and anxiety (Hospital Anxiety and Depression Scale), disease-specific distress (Cardiac Anxiety Questionnaire—CAQ), and social desirability (Socially Desirable Response Set—SDRS). Interviews were analyzed using interpretative phenomenological analysis (IPA). Results: Seventeen male patients participated (PS: n = 9; OSO: n = 8). Three themes emerged from IPA: (1) PS as a somatic experience, (2) the emotional impact of PSs, and (3) searching for meaning. Quantitative analyses showed that both groups exhibited elevated trauma and anxiety levels. Effect size differences (ESD) suggested a medium ESD on depression (P = 0.176, ηp 2 = 0.118) and PTSD (avoidance: P = 0.383, ηp 2 = 0.055, numbing: P = 0.311, ηp 2 = 0.068), and a large ESD on SDRS (P = 0.081, ηp 2 = 0.189), where PS participants, comparatively, exhibited elevated levels. A medium ESD was detected on CAQ-fear (P = 0.237, ηp 2 = 0.092) where OSO participants exhibited greater heart-focused worry. Conclusion: The qualitative and quantitative findings of this mixed method study show convergence in terms of the emotional factors associated with the experience of PSs. PSs are often reported to be indistinguishable from objective shocks, evoking alarm, frustration, and confusion, forcing the individual to face the uncertainties of what to them is a novel and confusing experience. (PACE 2013; 36:673–683)en_US
dc.description.sponsorshipThis study has not been funded by any source. AB was supported by an Ontario Graduate Scholarship. Dr. Kovacs has received speaking engagement honoraria from Medtronic Inc. Dr. Katz is supported by the Canadian Institutes of Health Research Canada Research Chair in Health Psychology. This paper is derived, in part, from the first author’s Master’s thesis.
dc.language.isoen_USen_US
dc.publisherWileyen_US
dc.rightsThis is the peer reviewed version of the following article: Bilanovic, A., Irvine, J., Kovacs, A., Hill, A., Cameron, D., & Katz, J. (2013). Uncovering phantom shocks in cardiac patients with an implantable cardioverter defibrillator. Pacing and Clinical Electrophysiology, 36(6), 673-83. doi: 10.1111/pace.12116 which has been published in final form at: http://onlinelibrary.wiley.com/doi/10.1111/pace.12116/abstract This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archivingen_US
dc.subjectphantom shocks, implantable cardioverter defibrillator, ICD, anxiety, depression, PTSDen_US
dc.titleUncovering phantom shocks in cardiac patients with an implantable cardioverter defibrillator
dc.typeArticleen_US
dc.rights.journalhttp://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1540-8159en_US
dc.rights.publisherhttp://www.wiley.com/WileyCDA/en_US
dc.rights.articlehttp://onlinelibrary.wiley.com/doi/10.1111/pace.12116/abstract


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