Prognostic Value of the Change in Heart Rate From the Supine to the Upright Position in Patients With Chronic Heart Failure

Abstract

BackgroundThe prognostic value of the change in heart rate from the supine to upright position (∆HR) in patients with chronic heart failure (HF) is unknown. Methods and Results∆HR was measured in patients enrolled in the Trial of Intensified Medical Therapy in Elderly Patients with Congestive Heart Failure (TIME‐CHF) who were in sinus rhythm and had no pacemaker throughout the trial (n=321). The impact of ∆HR on 18‐month outcome (HF hospitalization‐free survival) was assessed. In addition, the prognostic effect of changes in ∆HR between baseline and month 6 on outcomes in the following 12 months was determined. A lower ∆HR was associated with a higher risk of death or HF hospitalization (hazard ratio 1.79 [95% confidence interval {95% CI} 1.19‐2.75] if ∆HR ≤3 beats/min [bpm], P=0.004). In the multivariate analysis, lower ∆HR remained an independent predictor of death or HF hospitalization (hazard ratio 1.75 [95% CI, 1.18‐2.61] if ∆HR ≤3 bpm, P=0.004) along with ischemic HF etiology, lower estimated glomerular filtration rate, presence and extent of rales, and no baseline β‐blocker use. In patients without event during the first 6 months, the change in ∆HR from baseline to month 6 predicted death or HF hospitalization during the following 12 months (hazard ratio=2.13 [95% CI 1.12–5.00] if rise in ∆HR <2 bpm; P=0.027). Conclusions∆HR as a simple bedside test is an independent prognostic predictor in patients with chronic HF. ∆HR is modifiable, and changes in ∆HR also provide prognostic information, which raises the possibility that ∆HR may help to guide treatment. Clinical Trial Registration InformationURL: www.isrctn.org. Unique identifier: ISRCTN43596477.

Keywords

• autonomic nervous system
• heart failure
• heart rate/heart rate variability
• prognosis
• TIME‐CHF