Short-term effects of enhanced external counterpulsation on transthoracic coronary flow velocity and reserve in patients with coronary slow flow ☆

flow velocity and reserve in patients with coronary slow flow☆ Chufan Luo , Donghong Liu , Zhimin Du , Gregory W. Barsness , Xing Wu , Chengheng Hu , Yi Li , Xun Hu , Yan Zhang , Guifu Wu a,d,⁎ a Division of Cardiology, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China b Department of Ultrasound, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China c Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minn 55905, USA d Key Laboratory on Assisted Circulation, Ministry of Health, Guangzhou, China