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Determinants of coronary artery compliance in subjects with and without angiographic coronary artery disease

View larger version (97K): [in a new window]   Figure 1 Intravascular ultrasound images in diastole (right) and systole (left). The inner tracing marks the lumen-intima boundary, and the outer tracing the outer margin of the intima-media layer. Plaque area was calculated as the difference between these areas. Plaque cross-sectional area decreased from 7.8 mm2 during diastole to 6.9 mm2 during systole.

View larger version (22K): [in a new window]   Figure 2 The figure shows plaque area measured during diastole (gray bar) and systole (black bar) in the proximal and distal left anterior descending artery (LAD) and in the proximal circumflex (Cx). *p < 0.05, **p < 0.01 for the difference between systole and diastole.

View larger version (24K): [in a new window]   Figure 3 The figure shows the relation between cross-sectional compliance and plaque compression (+ve values indicate smaller systolic than diastolic plaque area). Cx = circumflex artery; LAD = left anterior descending artery.