Downing SW, Herzog, Jr. WR, McElroy MC, Gilbert TB. Feasibility of Off-Pump ASD Closure Using Real-Time 3-D Echocardiography. HSF [Internet]. 2002Jun.1 [cited 2024Nov.21];5(2):E096-E099. Available from: https://journal.hsforum.com/index.php/HSF/article/view/6167