INTRODUCTION AND OBJECTIVES
Retrograde aortocoronary dissection is an unusual complication of coronary angioplasty. Our study provides new structural details of the aortic sinuses and the proximal portions of the coronary arteries, which enable better understanding of several clinical features associated with this complication.
We studied eight… (More)
Figure 3. Frontal histological sections stained with Masson trichrome (a, d, f), picrosirius red under polarized light (b, and g) and electron scanning (c) of the sinotubular ridge and left periostial aortic wall (ac) and right (d-g). Note that the sinotubular ridge of the left coronary artery (a, b) has a greater number of smooth muscle cells and type I collagen fibers under polarized light (red-yellow in b) than the right coronary artery (d, e). Under scanning electron microscopy, we can see that the smooth muscle cells (SMC) in the left sinotubular ridge (c) overlap within a dense extracellular matrix, strengthening this part of the coronary ostium. In (f) atherosclerotic plaque (AP) can be seen in the sinotubular ridge of a right coronary artery that affects the