Distribution Features of Microvolt T-wave Alternation in Coronary Artery Disease Patients With MTWA Changes After Revascularization
10.3969/j.issn.1000-3614.2018.01.007
- VernacularTitle:冠心病患者运动平板试验中微伏级T波电交替分布特征及其在血运重建后的变化
- Author:
Ting-Ting LI
1
;
Jun YAN
;
Xiao-Qin HU
;
Wu XU
;
Yuan LU
;
Zhi-Rong WANG
Author Information
1. 徐州医科大学附属医院 心内科
- Keywords:
Coronary artery disease;
Angioplasty,transluminal,percutaneous coronary;
Microvolt T-wave alternation
- From:
Chinese Circulation Journal
2018;33(1):41-45
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To explore the distribution features of microvolt T-wave alternation(MTWA) through exercise stress test (EST) in coronary artery disease (CAD) patients with MTWA changes after revascularization. Methods: MTWA was measured in pre-cordial ECG leads in 326 patients with suspected CAD. Based on coronary angiography and coronary CTA, the patients were divided into 4 groups: ① Control group, patients without coronary stenosis, n=101, ② Coronary stenosis<50％ group, n=99, ③ 50％ ≤ Coronary stenosis<70％ group, n=53 and ④ Coronary stenosis ≥ 70％ group, n=73; MTWA was compared among different groups. 95 patients with coronary stenosis ≥ 50％were further divided into 2 subgroups: R (right coronary)stenosis ≥ 50％ subgroup, n=23 and LAD (left anterior descending branch) stenosis ≥ 50％ subgroup, n=72; MTWA was respectively compared to Control group. In addition, MTWA was collected from 103 patients with percutaneous coronary intervention (PCI) as PCI group, MTWA was compared to Coronary stenosis ≥ 70％ group. Results: MTWA was obviously higher in Coronary stenosis ≥ 70％ group than the other 3 groups, all P<0.01. Compared with Control group, Rstenosis ≥ 50％ subgroup had increased MTWA in V4-V6 pre-cordial leads, P<0.05; LAD stenosis≥50％ subgroup had increased MTWA in V1-V2 pre-cordial leads, P<0.01. Compared with Coronary stenosis ≥ 70％group, PCI group showed reduced MTWA, P<0.01. Conclusion: CAD patients with severe coronary stenosis (≥70％) had increased MTWA; MTWA distribution in body surface was approximately corresponding to coronary stenosis site and PCI may decrease MTWA in CAD patients.
