Education  |   October 2019
Partial Atrioventricular Canal Defect
Author Notes
  • From the Department of Anesthesiology, Wake Forest School of Medicine, Winston Salem, North Carolina.
  • Address correspondence to Dr. Fernando: rfernan@wakehealth.edu
Article Information
Education / Images in Anesthesiology / Cardiovascular Anesthesia / Pediatric Anesthesia
Education   |   October 2019
Partial Atrioventricular Canal Defect
Anesthesiology 10 2019, Vol.131, 896-897. doi:https://doi.org/10.1097/ALN.0000000000002795
Anesthesiology 10 2019, Vol.131, 896-897. doi:https://doi.org/10.1097/ALN.0000000000002795
Partial atrioventricular canal defect is a congenital heart malformation consisting of both an ostium primum atrial septal defect and a cleft dividing the anterior mitral valve leaflet.1  The primum atrial septal defect represents 15 to 20% of atrial septal defects and is caused by an endocardial cushion defect. It is typically diagnosed using echocardiography. The transesophageal echocardiographic midesophageal four-chamber view (image A) shows the defect between the right and left atria near the tricuspid and mitral valves. Significant right atrial and ventricular enlargement is observed due to volume overload from left-to-right shunting. A newly diagnosed primum atrial septal defect warrants mitral valve evaluation for the commonly associated anterior mitral valve leaflet cleft.1  The cleft is best appreciated using three-dimensional echocardiography from an en face view (image B).