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Table 2 Findings by angiography and QCA in the main coronary arteries

From: Coronary artery occlusions diagnosed by transthoracic Doppler

Segment Stenosis group 2 Stenosis group 3 Stenosis group 4 Blood flow direction in coronary trunk downstream to occlusion
(DS 50% – 75%) (DS 76% – 99%) (DS 100%; occlusion)
Retrograde Anterograde
LM 4 0 0   
pLAD 21 8 4 2 1
mLAD 15 3 2   2
dLAD 4 0 2   2
pCx 6 2 2   2
mCx 5 3 2 2  
dCx 3 2 0   
pRCA 14 7 6 6  
mdRCA 14 10 8 8  
PDA 4 1 2 2  
  1. dCx distal left circumflex coronary artery, dLAD distal left anterior descending coronary artery, DS diameter stenosis, LM left main coronary artery, mCx middle left circumflex coronary artery, mdRCA mid-to-distal right coronary artery, mLAD middle left anterior descending coronary artery, pCx proximal left circumflex coronary artery, PDA posterior descending coronary artery, pLAD proximal left anterior descending coronary artery, pRCA proximal right coronary artery, QCA quantitative coronary angiography.