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Abstract Title:

Vitamin D deficiency is a predictor of reduced survival in patients with heart failure; vitamin D supplementation improves outcome.

Abstract Source:

Eur J Heart Fail. 2012 Feb 3. Epub 2012 Feb 3. PMID: 22308011

Abstract Author(s):

Israel Gotsman, Ayelet Shauer, Donna R Zwas, Yaron Hellman, Andre Keren, Chaim Lotan, Dan Admon

Article Affiliation:

Heart Institute, Hadassah University Hospital, POB 12000, Jerusalem, Israel IL-91120.

Abstract:

AIMS: Vitamin D deficiency is a highly prevalent, global phenomenon. The prevalence in heart failure (HF) patients and its effect on outcome are less clear. We evaluated vitamin D levels and vitamin D supplementation in patients with HF and its effect on mortality. METHODS AND RESULTS: 25-Hydroxyvitamin D [25(OH)D] levels were evaluated in HF patients from a health maintenance organization (HMO), and compared them with those of the rest of the members of the HMO. Patients with HF (n = 3009) had a lower median 25(OH)D level compared with the control group (n = 46 825): 36.9 nmol/L (interquartile range 23.2-55.9) vs. 40.7 nmol/L (26.7-56.9), respectively, P<0.00001. The percentage of patients with vitamin D deficiency [25(OH)D<25 nmol/L] was higher in patients with HF compared with the control group (28% vs. 22%, P<0.00001). Only 8.8% of the HF patients had optimal 25(OH)D levels (≥75 nmol/L). Median clinical follow-up was 518 days. Cox regression analysis demonstrated that vitamin D deficiency was an independent predictor of increased mortality in patients with HF [hazard ratio (HR) 1.52, 95% confidence interval (CI) 1.21-1.92, P<0.001] and in the control group (HR 1.91, 95% CI 1.48-2.46, P<0.00001). Vitamin D supplementation was independently associated with reduced mortality in HF patients (HR 0.68, 95% CI 0.54-0.85, P<0.0001). Parameters associated with vitamin D deficiency in HF patients were decreased previous solar radiation exposure, body mass index, diabetes, female gender, pulse, and decreased calcium and haemoglobin levels. CONCLUSIONS: Vitamin D deficiency is highly prevalent in HF patients and is a significant predictor of reduced survival. Vitamin D supplementation was associated with improved outcome.

Study Type : Human Study

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Sayer Ji
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