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Table 7 Characterization of lesions with positive napkin ring sign (NRS)

From: High risk plaque criteria by multislice coronary CT angiography in patients with stable vs. unstable coronary artery disease: analytic cross-sectional study

Napkin ring sign (NRS) (n = 14)

Patient groups

Unstable group

Stable group

13 (92.8)

1 (7.2%)

Site

Proximal LAD (n, %)

Mid LAD (n, %)

8 (57.2%)

6 (42.8%)

Degree of stenosis

Non obstructive (n, %)

Obstructive (n, %)

13 (92.3%)

1 (7.75%)

Remodeling index (R.I)

R.I > 1.1 (n, %)

R.I <1.1 (n, %)

12 (89.3%)

2 (10.7%)

Hypo dense core

Hyper dense outer rim

Min. Max.

32.0–59.0

120.0–150.0

Mean ± SD.

43.93 ± 8.39

127.93 ± 12.58

Median

44.0

129.50