Jing Zhao1, Houcai Liang2, Wenbing Shi3. 1. Department of Cardiology, Haijiya Hospital of Heze, Heze, China. 2. Department of ICU, Dongda Hospital of Shanxian, Heze, China. 3. Department of Cardiology, Dongda Hospital of Shanxian, Heze, China - s.dswb@163.com.