Table 1.

Natural history and histological classification of atherosclerotic lesions in human coronary artery segments

Subject	Age	Sex	LM	LAD-p	LAD-m	LAD-d	LCX-p	LCX-m	LCX-d	RCA-p	RCA-m	RCA-d
Grade	81	Male	4	1	1	3	1	1	1	1	1	1
Stage			4	1	1	2	2	2	1	1	1	2

LM, left main trunk; LAD-p, proximal segment of the left anterior descending; LAD-m, midsegment of the left anterior descending; LAD-d, distal segment of the left anterior descending; LCX-p, proximal segment of the left circumflex; LCX-m, midsegment of the left circumflex; LCX-d, distal segment of the left circumflex; RCA-p, proximal segment of the right coronary artery; RCA-m, midsegment of the right coronary artery; RCA-d, distal segment of the right coronary artery. Grade: 1, 0 to 25% stenosis; 2, 26 to 50% stenosis; 3, 51 to 75% stenosis; 4, 76 to 100% stenosis. Stage: 0, normal tunica intima; 1, fatty streak tunica intima; 2, fibrous plaques tunica intima; 3, atherosclerotic tunica intima; 4, secondary affection tunica intima.