Agreement Determination between Coronary Calcium-Scoring and Coronary Stenosis Significance on CT-Angiography

The most important lesions in coronary artery disease (cad) are coronaryartery plaques, many of which are calcified. multi-slice spiral ct (msct) scanners canconcurrently perform coronary calcium scoring (ca-score) as a predictor of cad and coronaryct-angiography (ccta) as the determining factor in therapeutic decision-making. we aimedto determine the agreement of a ca-score more than 100 (based on agatston technique)with coronary artery stenosis significance on ccta.patients and methods: using ecg-gated msct, 65 patients who were referred for ccta wereassessed both for their ca-score and a significant (.50% diameter reduction) coronary stenosis,simultaneously. their total ca-score were classified in three groups (a-0, b-less than 100,and c-. 100). the severity of coronary stenosis was categorized to further three groups (1-lack of stenotic lesion, 2- presence of non-significant stenosis, and 3-presence of significantstenosis).results: of 65 patients referred for ccta, 42 (64.61%) had no cad, 8 (12.3%) had nonsignificantlesions, and 15 (23.09%) had significant stenoses. forty-three (66.2%) out of 65 subjectshad a zero, 14 (21.5%) had scores <100, and 8 (12.3%) had . 100 ca-score. in the firstgroup (ca-score = 0), only one had significant stenosis; while 50% of the patients in the secondgroup (ca-score < 100) and 87.5% from the third group (ca-score of . 100) had significantstenosis. significant coronary stenosis has a moderate-to-good agreement with a ca-score of100 or higher, compared to those with a ca-score of less than 100, and this was statisticallysignificant (p < 0.0001).conclusion: in patients with a calcium score of 100 or more, performing ccta may be advisableto assess the likelihood of significant cad.