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Vol 17, No 1 (2022)
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Published online: 2022-02-28

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Daily sunshine hours as determinant of 25-hydroxyvitamin D concentration among diabetic cardiac patients who experienced myocardial infarction hospitalized due to acute coronary syndrome: a cross-sectional study

Ewelina A. Dziedzic1, Jakub S. Gąsior2, Paweł Płudowski3, William B. Grant4, Tomasz Saniewski5, Marek Dąbrowski6
Folia Cardiologica 2022;17(1):1-10.


Introduction. Vitamin D deficiency is a worldwide problem with a variety of health consequences. Vitamin D may reduce the risk of heart failure, however, evidence of the impact of vitamin D treatment on maintenance of cardiovascular health (i.e., preventing cardiovascular diseases) is conflicting due to lack of support from clinical trials. The reason for the failure of clinical trials to confirm an effect of vitamin D supplementation could be at least threefold: 1) too little vitamin D given to the participants or 2) lack of inclusion of only severely vitamin D-deficient populations or 3) study duration. The aim of this study was to characterize a group of cardiac patients who presented the lowest concentrations of 25-hydroxyvitamin D [25(OH)D]. Material and methods. Results of 92 diabetic cardiac patients aged between 41 and 89 years who experienced myocardial infarction, with significant coronary arteries changes, hospitalized due to acute coronary syndrome living in Warsaw were analyzed. Results. Patients presented median 25(OH)D concentration value of 11 ng/mL (range: 4–28 ng/mL). The only significant determinant of 25(OH)D concentration was the date of examination, with higher concentrations in summer than in winter. Conclusions. Vitamin D treatment in Polish cardiac patients aimed at reaching the optimal level of 30 ng/mL (75 nmol/L) seems to be necessary and implemented as soon as possible.

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