To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Video 2 Doppler echocardiography showing a secundum atrial septal defect with left-to-right shunt in an apical four-chamber view. View Video 2 at http://movie-usa.glencoesoftware.com/video/10.1530/ERP-16-0017/video-2. A complicated trilogy: persistent left superior vena cava with hypertrophic cardiomyopathy and atrial septal defect Umut Kocabas, Esra Kaya, and Cahide Soydas Cinar 2016. 3:I1-I2 DOI: 10.1530/ERP-16-0017 Download Original Video