Relationship of aortic valve calcification with coronary artery calcium severity: The Multi-Ethnic Study of Atherosclerosis (MESA)
Received 26 June 2009; received in revised form 10 November 2009; accepted 4 December 2009. published online 14 December 2009.
Background
Aortic valve calcification (AVC) and atherosclerosis share causative and pathologic features.
Objective
We evaluated the relationship between AVC and coronary artery calcium (CAC) severity in the Multi-Ethnic Study of Atherosclerosis (MESA).
Methods
Men and women aged 45–84 years (n=6809; mean age, 62 years) were studied. The presence and burden of AVC and CAC were determined by noncontrast cardiac computed tomography. Relative risk regression was used to model the probability of AVC as a function of CAC>0 as well as CAC categories (0, 1–99, 100–399, and ≥400) with the reference group being CAC=0.
Results
The prevalence of AVC and CAC was 13% and 50%, respectively. Among those without CAC, the prevalence of AVC was 5% and increased across levels of CAC severity such that 14%, 25%, and 38% had AVC with increasing CAC scores of 1–99, 100–399, and ≥400, respectively (P for trend<0.0001). After controlling for patient demographic factors and cardiovascular risk factors, the prevalence ratio of AVC among those with mild CAC (1–99) was 1.83 (95% CI, 1.45–2.31) and increased to 3.36 (95% CI, 2.56–4.42) for CAC≥400. Similar statistically significant increased risk of AVC was found when CAC was assessed as a continuous variable.
Conclusion
Our study shows that AVC is independently associated with increasing severity of CAC.
ABSTRACT