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Enhanced external counterpulsation (EECP) is a recently approved treatment modality for patients with angina and heart failure.However,the efficacy of EECP on left ventricular (LV) function has not been well established.The study was aimed to determine whether EECP leads to an improvement in objective parameters of LV function.Patients with coronary artery disease (n =10) who showed evidence of stress-induced myocardial ischemia despite conventional medical or surgical therapies were enrolled and received EECP therapy for a total of 35 h.The therapeutic effects of EECP were examined by thallium-201 single-photon emission computed tomography (201T1-SPECT).