The Fab Four (ToF)
This classic chest X-ray finding in Tetralogy of Fallot is caused by right ventricular hypertrophy and gives the heart a characteristic shape.
What is a boot-shaped heart?
A vibration felt on the chest wall when blood flows turbulently through a valve is called this.
What is a thrill?
This fetal cardiac structure permits blood to flow directly from the right atrium to the left atrium, bypassing the lungs.
What is the foramen ovale?
This characteristic sign in infants with cyanotic congenital heart disease appears as a bluish tint of the skin and lips.
What is cyanosis?
This first-line, minimally invasive procedure is commonly used to relieve pulmonary valve stenosis in children.
What is balloon valvuloplasty?
This is the only left-sided structure among the four defining abnormalities of Tetralogy of Fallot.
What is an overriding aorta?
This heart sound represents the closure of the semilunar valves and is normally split into aortic and pulmonic components.
What is S2?
This fetal structure allows oxygenated blood from the placenta to bypass the liver and flow directly into the inferior vena cava.
What is the ductus venosus?
Tetralogy of Fallot, the most common cause of “blue baby syndrome,” results from a combination of four cardiac abnormalities. Name any one of these defects.
What is a ventricular septal defect (VSD), pulmonary stenosis, overriding aorta, or right ventricular hypertrophy?
For patients with pulmonary valve stenosis who develop valve deterioration later in life, this catheter-based procedure can replace the pulmonary valve without open-heart surgery.
What is transcatheter pulmonary valve replacement (TPVR)?
In Tetralogy of Fallot, cyanosis occurs because this hemodynamic change allows deoxygenated blood to bypass the lungs.
What is a right-to-left shunt across a ventricular septal defect?
This advanced imaging modality provides 3D visualization of cardiac structures, blood flow quantification, and postoperative assessment of right ventricular function in congenital heart disease, often complementing echocardiography. A chronic cyanotic child has elevated hemoglobin and hematocrit on a CBC due to this compensatory mechanism.
What is a cardiac MRI?
At birth, this physiologic change leads to functional closure of the foramen ovale by increasing left atrial pressure.
What is decreased pulmonary vascular resistance (PVR)?
Cyanosis in blue baby syndrome occurs because of this type of abnormal blood flow that bypasses the lungs.
What is a right-to-left shunt?
Balloon valvuloplasty is typically chosen for severe stenosis with significant pressure gradient because it has this main advantage compared to surgical repair.
What is minimally invasive with shorter recovery and good immediate gradient relief?
A child with Tetralogy of Fallot squats during a cyanotic episode; this maneuver improves symptoms by producing this key vascular change.
What is increased systemic vascular resistance (SVR)?
On ECG, right axis deviation, RBBB, and right atrial enlargement suggest chronic pressure overload of this chamber.
What is the right ventricle?
Tetralogy of Fallot results from abnormal development of this embryologic structure responsible for separating the aorta and pulmonary artery.
What is the conotruncal (aorticopulmonary) septum?
Chronic hypoxia in cyanotic congenital heart disease can lead to this compensatory increase in red blood cells, which may raise the risk of stroke or other thrombotic events.
What is secondary polycythemia?
Both balloon valvuloplasty and TPVR carry procedure-related risks. For balloon valvuloplasty, one of the most common long-term complications is this, which may later require valve replacement.
What is pulmonary regurgitation?
After surgical repair of Tetralogy of Fallot with a transannular patch, patients commonly develop this long-term complication requiring possible transcatheter pulmonary valve replacement (TPVR).
What is pulmonary valve regurgitation?
A child with chronic cyanotic heart disease often has elevated hemoglobin and hematocrit due to this physiologic response.
What is increased red blood cell production (polycythemia)?
Failure of neural crest cell migration disrupts conotruncal septation and is associated with Tetralogy of Fallot and this genetic microdeletion syndrome.
What is 22q11 deletion syndrome (DiGeorge syndrome)?
Surgical repair of Tetralogy of Fallot often involves this procedure to widen the right ventricular outflow tract, and these patients require antibiotic prophylaxis to prevent this serious infection.
What is a transannular patch; infective endocarditis?
Compared to balloon valvuloplasty, TPVR provides more controlled valve placement and improved long-term hemodynamics, but success is limited by this structural factor of the right ventricular outflow tract.
What is RVOT size, shape, or calcification?