NEGATIVE U-WAVE DURING PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY

被引:7
作者
YANO, H
HIASA, Y
AIHARA, T
NAKAYA, Y
MORI, H
机构
[1] UNIV TOKUSHIMA,SCH MED,DEPT INTERNAL MED 2,2-50 KURAMOTO CHO,TOKUSHIMA 770,JAPAN
[2] KOMATSUSHIMA RED CROSS HOSP,DEPT CARDIOL,TOKUSHIMA 770,JAPAN
关键词
NEGATIVE U-WAVE; PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY; ST-SEGMENT DEVIATION; MYOCARDIAL ISCHEMIA;
D O I
10.1002/clc.4960140311
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
To clarify the clinical significance of the negative U wave during acute myocardial ischemia, the appearance of the U wave and ST-segment elevation on electrocardiography during percutaneous transluminal coronary angioplasty (PTCA) of the left anterior descending artery (LAD group: 11 patients) or right coronary artery (RCA group: 18 patients) was studied. During PTCA, U-wave inversion (newly developed negative U wave, and increased negativity of the pre-existing negative U wave) was observed in 37 (90%) of 41 patients in the LAD group and in 16 (89%) of 18 patients in the RCA group. The incidence of ST-segment elevation was similar to that of U-wave inversion; however, U-wave inversion appeared before detectable ST-segment elevation in 20 patients (49%) in the LAD group and in 4 patients (22%) in the RCA group. Moreover, U-wave inversion was observed frequently in a wider range of leads than ST-segment elevation. These results suggest that the U wave is a more sensitive indicator of myocardial ischemia than ST-segment elevation in some patients, and that a negative U wave may be produced by a different mechanism than that which produces ST-segment deviation, although both are related to myocardial ischemia.
引用
收藏
页码:232 / 236
页数:5
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