Background: Hypertension (HTN) is associated with coronary artery calcification (CAC). We hypothesized that preexisting CAC is associated with the development of HTN.
Methods: This study included 483 normotensive subjects (mean age 54 years, 83% males) who underwent a baseline evaluation of their CAC score with ungated dual-section computed tomography during 2001-2002 and returned for at least the first annual follow-up. All subjects underwent an annual examination and were followed for a mean period of 6.6 ± 3.2 years to identify newly developed HTN. Data on the patient's medical history, physical examination and laboratory evaluations were collected.
Results: During the follow-up, 104 subjects developed HTN. The rate of newly developed HTN was significantly higher among those with CAC (60 of 223 subjects; 27%) than among those without CAC (44 of 260; 17%) (P < 0.01). The presence of CAC predicted the development of HTN with a hazard ratio of 1.73 (95% confidence interval, 1.17-2.56; P < 0.01). After adjustment for age, sex, body mass index, smoking, baseline systolic blood pressure, and levels of glucose, triglycerides, and low-density lipoprotein cholesterol, the presence of CAC still predicted the development of HTN with a hazard ratio of 1.63 (95% confidence interval, 1.02-2.60; P = 0.04).
Conclusions: Preexisting CAC is associated with the development of HTN.
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