Aortic Arch Calcification Is a Strong Predictor of the Severity of Coronary Artery Disease in Patients with Acute Coronary Syndrome

Figure 1

The aortic arch calcification (AAC) extent in four-point scale and distribution of AAC grades on a chest X -ray. (a) The extent of AAC on a chest X-ray was divided into four grades: grade 0, no visible calcification (panel A); grade 1, small spots of calcification or a single thin area of calcification of the aortic knob (panel B); grade 2, one or more areas of thick calcification (panel C); grade 3, circular calcification of the aortic knob (panel D). (b) Distribution of AAC grades on chest X-ray in all subjects.

(a)

(b)