Vitamin D reduces left atrial volume in patients with left ventricular hypertrophy and chronic kidney disease

Academic Article

Abstract

  • Background: Left atrial enlargement, a sensitive integrator of left ventricular diastolic function, is associated with increased cardiovascular morbidity and mortality. Vitamin D is linked to lower cardiovascular morbidity, possibly modifying cardiac structure and function; however, firm evidence is lacking. We assessed the effect of an activated vitamin D analog on left atrial volume index (LAVi) in a post hoc analysis of the PRIMO trial (clinicaltrials.gov: NCT00497146). Methods and results: One hundred ninety-six patients with chronic kidney disease (estimated glomerular filtration rate 15-60 mL/min per 1.73m ), mild to moderate left ventricular hypertrophy, and preserved ejection fraction were randomly assigned to 2 μg of oral paricalcitol or matching placebo for 48 weeks. Two-dimensional echocardiography was obtained at baseline and at 24 and 48 weeks after initiation of therapy. Over the study period, there was a significant decrease in LAVi (-2.79 mL/m , 95% CI -4.00 to -1.59 mL/m ) in the paricalcitol group compared with the placebo group (-0.70 mL/m [95% CI -1.93 to 0.53 mL/m ], P =.002). Paricalcitol also attenuated the rise in levels of brain natriuretic peptide (10.8% in paricalcitol vs 21.3% in placebo, P =.02). For the entire population, the change in brain natriuretic peptide correlated with change in LAVi (r = 0.17, P =.03). Conclusions: Forty-eight weeks of therapy with an active vitamin D analog reduces LAVi and attenuates the rise of BNP. In a population where only few therapies alter cardiovascular related morbidity and mortality, these post hoc results warrant further confirmation. © 2012 Mosby, Inc. 2 2 2 2 2
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    Author List

  • Tamez H; Zoccali C; Packham D; Wenger J; Bhan I; Appelbaum E; Pritchett Y; Chang Y; Agarwal R; Wanner C
  • Volume

  • 164
  • Issue

  • 6