✔️ A. Defects with decreased pulmonary blood flow
💓 These defects involve obstruction or limitation in blood flow to the lungs, causing reduced oxygenation of blood.
💓 Examples include:
– Tetralogy of Fallot (TOF)
– Tricuspid atresia
💓 In these conditions, deoxygenated blood bypasses the lungs, often resulting in cyanosis (bluish skin/mucosa).
💓 Infants may experience "tet spells", or sudden hypoxic episodes with crying or exertion.
✔️ B. Defects with increased pulmonary blood flow
💓 These defects allow too much blood to flow to the lungs, often due to left-to-right shunting.
💓 Examples include:
– Atrial septal defect (ASD)
– Ventricular septal defect (VSD)
– Patent ductus arteriosus (PDA)
💓 The excess flow leads to pulmonary congestion, tachypnea, and eventually right-sided heart strain.
✔️ C. Cyanotic defects
💓 Cyanotic heart defects involve mixing of oxygenated and deoxygenated blood, leading to lower oxygen delivery to tissues.
💓 These include:
– Tetralogy of Fallot
– Tricuspid atresia
– Transposition of the great arteries (TGA)
💓 Cyanosis is often visible as bluish lips, nail beds, or mucosa, especially during feeding or crying.
systemic oxygenation.
✔️ D. Mixed defects
💓 In these defects, oxygen-rich and oxygen-poor blood mix within the heart or great vessels, creating variable oxygen delivery.
💓 Examples include:
– Transposition of the great arteries (TGA)
– Truncus arteriosus
– Hypoplastic left heart syndrome (HLHS)
💓 These defects are often severe and life-threatening, requiring immediate stabilization with prostaglandins and surgery.
✔️ E. Acyanotic defects
💓 These are typically left-to-right shunts or obstructive defects that do not initially cause cyanosis.
💓 Examples include:
– VSD, ASD, PDA
– Coarctation of the aorta (in early stages)
💓 These defects may still cause pulmonary overcirculation, heart failure, or poor growth, but the child remains pink.
✔️ F. Obstructive defects
💓 These involve narrowing or blockage of a vessel or valve, impeding forward blood flow.
💓 Examples include:
– Coarctation of the aorta
– Aortic stenosis
– Pulmonary stenosis
💓 These defects may present with hypertension, diminished pulses, heart failure, or shock, depending on severity.