<unk> ing refers to the abnormal situation in which blood travels form the left side of the heart or the arterial circulation to to the<unk>  side. In patients with atrial septal defects, the circulation of blood flow may become altered due to an opening or hole in wall or septum that separates the left atrium and<unk>  atrium. Because the blood pressure is higher in the left atrium than in the<unk>  atrium, there is initially a change in the blood flow from left-to-right, referred to as<unk> ing.  There may also be<unk> ing in patients with a ventricular septal defect and in those patients in which there is an anomalous connection between the great vessels.
Left-to-right shunt
Right-to-left shunt
Cardiac shunt
Ventricular reduction
Diaphragmatic breathing
Ventilation-perfusion mismatch
Convergence insufficiency
Atrial septal defect left-to-right shunt