Ping-Pong Guide Catheters to Facilitate Real-Time Intravascular Ultrasound-Guided Recanalization of Stumpless Chronic Total Occlusion oleh Ching-Tang Chang, MD, Wen-Hsien Lee, MD, Hsuan-Fu Kuo, MD, Mark Z. Chen, PhD, Po-Chao Hsu, MD, Chih-Sheng Chu, MD, Ho-Ming Su, MD, Tsung-Hsien Lin, MD, Hsueh-Wei Yen, MD, Cheng-An Chiu, MD