方法观察34例经冠状动脉造影确诊为左冠状动脉狭窄而右冠状动脉无病变的冠心病患者，注射造影剂前后QRS时间和额面电轴的变化。
Methods QRS duration and frontal plane QRS axis were measured before and after injection of contrast medium in 34 patients with left coronary artery disease identified by coronary angiography.
结果冠状动脉狭窄发生率依次为前降支、右冠、回旋支及其他分支。
Results the stenosis of coronary artery occurred in left anterior descending most frequently, right coronary artery secondly, left circumflex thirdly and other branches.
冠状动脉各支在70％相位窗上显示率最高，LAD、LCA、RCA分别为96％、92％、86％，右冠状动脉在40％相位窗上显示率也较高，为74％；
The rate of demonstration of every artery (LAD96% LCA92% RCA86% ) was highest in 70% reconstruction window and relatively higher in RCA (74% ) in 40% reconstruction window .
罪犯血管为左前降支26例（66.7%），右冠状动脉5例（12.8%），左回旋支及钝缘支3例（7.7%），后降支5例（12.8%）。
The culprit vessel was left anterior descending in 26(66.7%), right coronary artery in 5(12.8%), circumflexobtuse marginal in 3(7.7%), and posterior descending in 5(128%).
结果在检查的1000例病人中380例（38%）有壁冠状动脉存在，其中314例发生在前降支及其分支，32例发生在回旋支及其分支，13例发生在右冠状动脉及其分支，另外21例为多支病变。
Results Parietal coronary arteriae were found in 380 patients, among them, 314 cases were at the LAD, 32 cases were at the CX, 13 cases were at the RCA and multiple arteriae involved in 21cases.
结果在检查的1000例病人中380例（38%）有壁冠状动脉存在，其中314例发生在前降支及其分支，32例发生在回旋支及其分支，13例发生在右冠状动脉及其分支，另外21例为多支病变。
Results Parietal coronary arteriae were found in 380 patients, among them, 314 cases were at the LAD, 32 cases were at the CX, 13 cases were at the RCA and multiple arteriae involved in 21cases.
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