Figure 2. Microbubbles entered the left atrium, consistent with the presence of a right to left shunt across a patent foramen ovale and/or small atrial septal defect

From

Huge Interatrial Septum Aneurysm

Pramod Theetha Kariyanna, Apoorva Jayarangaiah, Robert Adrah, Abhishek Sharma

American Journal of Medical Case Reports. 2016, 4(3), 111-114 doi:10.12691/ajmcr-4-3-10