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Although patients with poor ability to perform activities of daily living, such as those with high Clinical Frailty Score (CFS), will often receive a cardiac implantable electric device (CIED), the indications for implantation in these patients have not been clearly defined. We investigated the association between CFS and prognosis in patients with a CIED.Methods and Results:We retrospectively enrolled 323 consecutive patients who underwent initial device implantation (age, 77 (70-83) years; male, 181 [56%] patients; high-voltage device, 49 [15%] patients), and the CFS was retrospectively estimated. Primary outcome was all-cause death, and the secondary outcome was hospitalization due to heart failure (HF). Median CFS was 4 (3-5) points. During 2 years' follow-up, all-cause death occurred in 32 patients (10%). Freedom from all-cause death was significantly lower in patients with a high CFS than in those with a low score (1-2 points: 100%, 3-4 points: 92.9%, 5-9 points: 77.3%, P&lt;0.01). After adjustment for age and sex, the CFS was an independent predictor of the primary outcome (hazard ratio [HR] 2.0, 95% confidence interval [CI] 1.6-2.5, P&lt;0.01), and of the secondary outcome (HR 1.6 [95% CI 1.2-2.0], P&lt;0.01).

Clinical Frailty Score Predicts Long-Term Mortality and Hospitalization Due to Heart Failure After Implantation of Cardiac Implantable Electric Device