右冠状动脉和/或左旋支动脉痉挛时QRS电轴短暂向右偏移。

Transient QRS axis shift to the right during right coronary artery and/or left circumflex artery spasms.

作者信息

Matsumoto T, Ogino K, Kinugawa T, Hoshio A, Miyakoda H, Kotake H, Mashiba H, Endo S

机构信息

First Department of Internal Medicine, Tottori University School of Medicine, Japan.

出版信息

Cardiology. 1989;76(3):222-7. doi: 10.1159/000174494.

DOI:10.1159/000174494

PMID:2776142

Abstract

The QRS axis was measured in 24 patients during ergonovine malate provocation test (EM test). Of 12 patients with significant spasm of the right coronary artery (RCA) and/or left circumflex artery (LCX), the QRS axis shifted to the right in 7 patients after the EM test (mean 8.2 degrees), and the axis shifted back to the left in 9 patients after nitroglycerin administration (mean -9.1 degrees). The sensitivity of right axis shift for RCA and LCX spasm was 58% and the specificity was 80%. Thus, right axis shift seems to be associated with myocardial ischemia due to RCA and LCX spasm and to be useful for the detection of RCA and/or LCX spasms.

摘要

在24例患者进行苹果酸麦角新碱激发试验（EM试验）期间测量了QRS轴。在12例右冠状动脉（RCA）和/或左旋支动脉（LCX）发生明显痉挛的患者中，7例患者在EM试验后QRS轴向右移位（平均8.2度），9例患者在给予硝酸甘油后轴又向左移位（平均-9.1度）。右轴移位对RCA和LCX痉挛的敏感性为58%，特异性为80%。因此，右轴移位似乎与RCA和LCX痉挛所致的心肌缺血相关，并且对检测RCA和/或LCX痉挛有用。