Compared Study of Low Dose Dobutamine Stress Echocardiography Combined with Integrated Backscatter Stress 99m Tc Single Pho-ton Emission Computed Tomography for Evaluating Viable Myocardium in Patients with Coronary Artery Disease
Chang Chao
Liu Jixiang
Xin Shuanli
Li Qin
Ma Baohong
Yang Meixia
Wang Sulan
Zhang Bo
Yang Hua
Abstract：Objective To explore the clinical value of low dose dobutamine(Dob)stress echocardiography(DSE)combined with inte-grated backscatter(IBS)for identifying viable myocardium in patients with coronary artery disease(CAD).Methods Eighteen pa-tients whose results of the quantitative coronary artery were normal underwent the examination of 2 DE,DSE with IBS in group CON.22 patients who were diagnosed CAD by quantitative coronary artery (QCA)in group CAD,percutaneous coronary intervention (PCI)was performed further LDDSE [5,10μg/(kg· min)]and rest/NTG SPECT were checked one week before PCI.IBS images at rest and every grade infusion of Dob 5 minutes were obtained in total apical views(Lax,2 ch,4 ch).Two dimension echocardio-graphy was examined after three months of PCI again.Defining the maximum changing value of CVIB (K)during DSE>0.7 as viable myocardium,then the accuracy in identifying viable myocardium were compared among LDDSE,SPECT and LDDSE combined with IBS.Results The sensitivity,accuracy for identifying viable myocardium were significantly higher by LDDSE combined with IBS than those of LDDSE (sensitivity:91.1% vs 77.8%,accuracy:90.4 vs 75.7%,respectively P<0.05).Compared with SPECT,the sensitivi-ty and accuracy had been significantly improved by LDDSE combined with IBS,whose numbers were 91.1%,90.4% respectively. Conclusion LDDSE combined with IBS identifying viable myocardium has higher accuracy than SPECT,it is more practical in clinic.
Keywords：dobutamineechocardiographysingle photon emission computerized tomographyintegrated backscatterviable myocar-dium
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 728-730 )