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  Indian J Med Microbiol
 

Figure 3: Grading of stenosis of coronary arteries depending on the obstruction of the lumen, (a) grade I stenosis, (b) Grade II, (c) Grade III and (d) Grade IV stenosis (a) shows <25% block, (b) shows <50% block, (c) shows <75% block and (d) shows >75% block with an overlying thrombus (H and E, ×25)

Figure 3: Grading of stenosis of coronary arteries depending on the obstruction of the lumen, (a) grade I stenosis, (b) Grade II, (c) Grade III and (d) Grade IV stenosis (a) shows <25% block, (b) shows <50% block, (c) shows <75% block and (d) shows >75% block with an overlying thrombus (H and E, ×25)