alexa Vitamin D deficiency, coronary artery disease, and endothelial dysfunction: observations from a coronary angiographic study in Indian patients.
Clinical Sciences

Clinical Sciences

Cardiovascular Pharmacology: Open Access

Author(s): Syal SK, Kapoor A, Bhatia E, Sinha A, Kumar S,

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Abstract BACKGROUND AND METHODS: Vitamin D deficiency has been linked to an increased risk of coronary artery disease (CAD) and cardiovascular (CV) death. Endothelial dysfunction plays an important role in pathogenesis of CAD and vitamin D deficiency is postulated to promote endothelial dysfunction. Despite rising trends of CAD in Asians, only limited data are available on the relationship between vitamin D, CAD, and endothelial dysfunction. RESULTS: In a study of 100 patients undergoing coronary angiography, mean 25(OH)D level was 14.8 ± 9.1 ng/mL; vitamin D deficiency was present in 80\% and only 7\% had optimal 25(OH)D levels. Nearly one-third (36\%) were severely deficient, with 25(OH)D levels <10 ng/mL. Those with vitamin D deficiency had significantly higher prevalence of double- or triple-vessel CAD (53\% vs 38\%), diffuse CAD (56\% vs 34\%), and higher number of coronary vessels involved as compared to those with higher 25(OH)D levels. Those with lower 25(OH)D levels had significantly lower brachial artery flow-mediated dilation (FMD; 4.57\% vs 10.68\%: P<.001) and significantly higher prevalence of impaired FMD (values <4.5\%; 50.6\% vs 7\%; P<.002). A graded relationship between 25(OH)D levels and FMD was observed; impaired FMD was noted in 62.2\%, 38.6\%, and 13.3\% in those with 25(OH)D levels <10 ng/mL, 10-20 ng/mL, and >20 ng/mL, respectively. CONCLUSION: Indian patients with angiographically documented CAD frequently have vitamin D deficiency. Patients with lower 25(OH)D levels had higher prevalence of double- or triple-vessel CAD and diffuse CAD. Endothelial dysfunction as assessed by brachial artery FMD was also more frequently observed in those with low 25(OH)D levels.
This article was published in J Invasive Cardiol and referenced in Cardiovascular Pharmacology: Open Access

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