Europace Advance Access originally published online on April 13, 2007
Europace 2007 9(8):675-680; doi:10.1093/europace/eum041
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ICD AND MONITORING
Type-D personality but not implantable cardioverter-defibrillator indication is associated with impaired health-related quality of life 3 months post-implantation
1 CoRPS, Department of Medical Psychology, Center of Research on Psychology in Somatic diseases, Room P503a, Tilburg University, Warandelaan 2, PO Box 90153, 5000 LE Tilburg, The Netherlands; 2 Department of Cardiology, Thoraxcenter, Erasmus Medical Center, The Netherlands
Aims Little is known about the impact of ICD indication (primary vs. secondary) on health-related quality of life (HRQL). Indication may also interact with psychological factors, such as personality. Using a prospective design, we examined whether ICD indication and type-D personality (i.e. experiencing increased negative emotions paired with emotional non-expression) serve as modulators of HRQL at baseline and 3 months post-implantation.
Methods and results Consecutively implanted ICD patients (n = 154) completed the Type-D Scale (DS14) at baseline and the Short-Form Health Survey 36 (SF-36) at baseline and 3 months. Of all patients, 82 (53%) received an ICD due to prophylactic reasons; the prevalence of type-D was 23%. Indication had no influence on HRQL (P = 0.75). Further stratification by personality showed a main effect for type-D personality (P < 0.001), with type-D patients generally experiencing poorer HRQL; there was no main effect for indication (P = 0.45) nor was the interaction effect indication by type-D significant (P = 0.22). There was a significant improvement in HRQL over time (P = 0.001). Type-D remained an independent predictor of impaired HRQL, adjusting for clinical factors and shocks during follow-up (P < 0.001). However, in adjusted analysis there was no longer a significant change in HRQL over time (P = 0.099).
Conclusion Type-D personality but not ICD indication was associated with impaired HRQL at the time of implantation and at 3 months. In the quest for enhancing risk stratification in clinical practice, personality factors, such as type-D, should not be ignored, as both type-D and poor HRQL have been associated with increased risk of mortality in cardiac patients.
Key Words: Health-related quality of life, Implantable cardioverter-defibrillator, Primary prevention, Secondary prevention, Type-D personality
* Corresponding author: Tel: +31 13 466 2503; fax: +31 13 466 2067. E-mail address: s.s.pedersen{at}uvt.nl
Manuscript submitted 13 November 2006. Accepted after revision 24 February 2007.
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