Vulnerable plaque burden post pharmacological and interventional treatments in patients with acute coronary syndrome and borderline lesion: intravascular ultrasound follow up results
10.3760/cma.j.issn.0253-3758.2011.02.011
- VernacularTitle:血管内超声对急性冠状动脉综合征临界病变治疗决策的影响
- Author:
Dan-Qing YU
1
;
Shu-Guang LIN
;
Ying-Ling ZHOU
;
Guang LI
;
Ning TAN
;
Hao-Jian DONG
;
Ji-Yan CHEN
Author Information
1. 广东省医学科学院,广东省人民医院
- Keywords:
Coronary disease;
Ultrasonography,interventional;
Drug therapy;
Treatment outcome
- From:
Chinese Journal of Cardiology
2011;39(2):137-141
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the efficacy and safety between the interventional and conservative treatment options for borderline vulnerable plaque lesion in acute coronary syndrome (ACS)patients by intravascular ultrasound(IVUS). Methods A total of 100 ACS patients [78 male, age 43 -74 (60. 4 ± 14. 1 ) years] undergoing coronary angiography (CAG) with borderline lesion ( coronary artery stenosis between 50% - 70% ) were enrolled in May 2007 to February 2009, who were randomly divided into PCI group (50 patients) and conservative therapy group (50 patients). According to minimal lumen area (MLA) detected by IVUS, patients were further divided into MLA ≥4. 0 mm2 sub-group and MLA ＜4.0 mm2 sub-groups. Outcomes during hospitalization and after 10- 12 month follow-up were compared. Results IVUS was performed in 40 patients at 10 - 12 months post PCI, there was no in-stent thrombosis and the extent of stent neointimal hyperplasia was comparable as at the time of immediately post PCI. IVUS was performed in 35 patients at 10 - 12 months post conservative therapy, IVUS results showed that MLA increased signilicantly [(7.32 ± 1.42 ) mm2 vs. (4. 98 ± 0. 89 ) mm2, P ＜ 0. 01], while plaque area [(7.70 ±2.09)mm2 vs. (10.01 ±2.55)mm2,P＜0.05], plaque burden [(55.94 ±8.36)% vs. (67.97 ±9. 36) %] and low echo area [(4. 08 ± 0. 80) mm2 vs. (2. 27 ± 0. 79) mm2] were significantly decreased at follow up compared to those as baseline ( all P ＜0. 01 ). There was one patient in PCI group with MLA ≥4. 0 mm2 developed acute in-stent thrombosis in left anterior descending artery two days after the procedure and 9 patients in conservative therapy and MLA ＜ 4. 0 mm2 group received PCI due to recurrent angina pectoris during follow-up. Conclusions For the borderline lesion with MLA≥4.0 mm2 detected by IVUS, adequate medication could effectively attenuate and or reverse the plaque progression and stabilize plaque.
