In these, blood is shunted (flows) from the left side of the heart to the right side of the heart, most often due to a structural defect (hole) in the interventricular septum.

[1] People often retain normal levels of oxyhemoglobin saturation in systemic circulation.

[citation needed] This term is outdated, because a person with an acyanotic heart defect may show cyanosis (turn blue due to insufficient oxygen in the blood).

[1] Presentation is the following:[citation needed] This condition can cause congestive heart failure.

[1] Left to right shunting heart defects include:[citation needed] Others:[citation needed] Acyanotic heart defects without shunting include:[citation needed] Treatment of this condition can be done via:[citation needed]