Clinical study on microvascular reserve by myocardial contrast echocardiography using intravenously infused Levovist
- VernacularTitle:心肌声学造影评估心肌微血管血流储备的临床研究
- Author:
Jing ZHAO
;
Yun ZHANG
;
Wei ZHANG
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Contrast media;
Myocardial ischemia;
Myocardial reperfusion
- From:
Chinese Journal of Ultrasonography
1993;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish the feasibility and clinical applications of intravenous myocardial perfusion imaging with Levovist in assessing the coronary microcirculaton reserve.Methods Intravenous myocardial contrast echocardiography (IMCE) was performed pre and post dipyridamole injection in 10 cases with normal coronary angiography (group I) and 8 cases with 50% to 70% stenosis in the lift anterior descending branch(LAD) (group Ⅱ) respectively.A set of special instrumental setting and an integrated imaging approach including power Doppler imaging,incremental triggering imaging and harmonic imaging were utilized to record the apical four chamber view.The power Doppler signals of the septum were analyzed and the time amplitude curves were plotted during Levovist infusion and incremental triggering.The maximal amplitude score (A),the mean ascending slope of the curve(?) and the product of A?? were measured.The reserve of A,? and A?? were also calculated.Results At baseline,both group I and group Ⅱ had normal myocardial perfusion.After dipyridamole infusion,contrast score A increased slightly in group I and decreased in group Ⅱ without statistical significance.Both ? and A?? were increased significantly after dipyradamole (P
