serum vitamin d level and hypertensive crises

Introduction: vitamin d deficiency is associated with hypertension; however, there is no study on the relationship between vitamin d deficiency and hypertensive crises. this study aimed to determine the relationship between serum vitamin d levels and hypertensive crises. material and methods: this descriptive-analytical, cross-sectional study was conducted on 120 individuals in shafa hospital in 2016 within the age range of 40-80 years, selected through simple random sampling technique. the research population was divided into two groups of hypertensive crises (n=60) with blood pressure over 180/120 mm/hg and hypertensive patients without history of hypertensive crises (n=60). for the purpose of the study, 5 ml peripheral venous blood samples were collected. the blood serum was isolated by a centrifugal device, and the serum vitamin d levels were analyzed by radioimmunoassay. results: the mean levels of vitamin d in hypertensive and non- hypertensive crises groups were 29.73 and 30.23 ng/ml, respectively. there was no significant difference between the two groups in terms of vitamin d levels (p>0.05). however, no statistically significant difference was observed between the two groups considering gender (p>0.05). serum vitamin d levels showed a direct correlation with the duration of hypertension and age (p<0.05 and p<0.01, respectively).in addition, there was a significant correlation between serum vitamin d levels and the number of hypertensive crises over the past year. in this regard, the reduction of serum vitamin d levels was accompanied with the enhancement of the number of hypertensive crises (p<0.01).conclusion: there is evidence on the relationship between serum vitamin d levels and cardiovascular diseases, including hypertension. nonetheless, in the present study, no significant relationship was observed between serum vitamin d level and hypertensive crises.