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Deceleration capacity: A novel predictor for total mortality in patients with non-ischemic dilated cardiomyopathy.

OBJECTIVES: We hypothesized that deceleration capacity (DC), a novel marker of cardiac autonomic modulation, is an independent predictor for mortality in patients with non-ischemic dilated cardiomyopathy (NICM).

BACKGROUND: NICM is associated with a high risk for sudden cardiac death (SCD). However there are no clinically established parameters available for risk stratification beyond LVEF. DC has been previously shown to be a strong independent predictor for total mortality in patients after myocardial infarction.

METHODS: Holter-ECG recordings of 201 patients NICM (83.1% male, mean age: 61.4years, mean LVEF: 33.3%) were analyzed by the method of phase-rectified-signal-averaging (PRSA) to obtain DC.

RESULTS: During a minimum follow-up of 40month 59 patients died. Kaplan Meyer Analysis showed a significantly higher mortality in patients with a DC below 4.5ms (log rank p=0.012) irrespective to the presence of atrial fibrillation.

CONCLUSIONS: Impaired DC is a powerful independent predictor for mortality in patients with NICM.

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