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Depression and outcome among veterans with implantable cardioverter defibrillators with or without cardiac resynchronization therapy capability.

Shalaby AA, Brumberg GE, Pointer L, Bekelman DB, Rumsfeld JS, Yang Y, Pellegrini CN, Heidenreich PA, Keung E, Massie BM, Varosy PD. Depression and outcome among veterans with implantable cardioverter defibrillators with or without cardiac resynchronization therapy capability. Pacing and Clinical Electrophysiology. 2014 Aug 1; 37(8):994-1001.

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Abstract:

BACKGROUND: The impact of depression on outcome in implantable cardioverter defibrillator (ICD) recipients has not been fully appreciated. We assessed the prevalence of depression and its association with heart failure (HF) outcome among veterans with ICDs. METHODS AND RESULTS: Patients enrolled between January 2005 and January 2010 in the Outcomes among Veterans with Implantable Defibrillators Registry were studied. We examined the cross-sectional association of depression with severity of HF functional class as well as the association of depression with the composite outcome of mortality or HF hospitalization over a mean follow-up time of 2.7 years. There were 3,862 patients enrolled. Patients with depression (1,162, 43%) were younger (63.1 ± 9.4 years vs 66.6 ± 9.9 years, P < 0.001), more likely to have a history of tobacco or alcohol abuse (P < 0.0001) or atrial fibrillation (P = 0.05) while having a higher ejection fraction (28.3% vs 27.4%, P = 0.03). Depression was associated with advanced HF class at time of implant; odds ratio (OR; vs class I) for class III: 1.65 (confidence interval [CI] 1.17-2.33), class IV: 1.73 (95% CI 1.08-2.76). Death or HF hospitalization was more likely to occur in patients with depression (35.2% vs 32.0%, HR: 1.15 [95% CI 0.99-1.33]). The predictive value of depression was stronger after multivariable adjustment; HR: 1.25 (95% CI 1.05-1.49). CONCLUSION: Depression was prevalent among veterans with ICDs. Depression was associated with severity of HF. The predictive value of associated depression was significant after multivariable adjustment.





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