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PURPOSE
To investigate the association between aortic root calcification (ARC) and coronary artery calcification (CAC) assessed by coronary artery calcium-scoring dual-source computed tomography (DSCT).

MATERIALS AND METHODS
We retrospectively analyzed 143 consecutive patients who underwent coronary artery calcium-scoring during coronary DSCT angiography. 57 patients had findings of ARC on calcium-scoring scans. ARC volume (ARCV) and Agatston coronary artery calcium score (CACS) were calculated. Chi-square test was used to assess differences of categorical variables between patients with and without ARC. Statistical significances between both groups were assessed with the independent-Sample t test.

RESULTS
Compared with patients without ARC (n=86), patients with ARC (n=57) showed a significantly higher presence of CAC (87.7% vs. 24.4%; P<0.001), and a higher mean CACS (700.6 ± 941.2 vs. 256.4 ± 724.3; P=0.009) in patients with CAC. Patients with a calculated ARCV > 40 mm(3) (n=32) showed significantly higher rates of severe CAC (56.3% vs. 24.0%; P=0.014) compared with patients with an ARCV< 40 mm(3) (n=25). Compared with patients without CAC (n=42), patients with CAC (n=101) showed a significantly higher presence of ARC (83.3% vs. 50.5%; P<0.001) and a higher mean ARCV (95.4 ± 116.2mm(3) vs. 29.7 ± 33.0 mm(3); P=0.003). Severe CAC (n=24) correlated with an increased mean ARCV (122.3 ± 148.8mm(3)) compared to patients with minimal to moderate CAC (n=33, mean ARCV: 61.9 ± 64.8mm(3); P<0.05).

CONCLUSIONS
The extent of ARC is directly associated with the presence and degree of CAC on calcium-scoring scans during coronary DSCT angiography.