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Tetralogy of Fallot (TOF), formerly known as Steno-Fallot tetralogy, [9] is a congenital heart defect characterized by four specific cardiac defects. [4] Classically, the four defects are: [ 4 ] pulmonary stenosis , which is narrowing of the exit from the right ventricle;
Digital clubbing with cyanotic nail beds in an adult with tetralogy of Fallot. Signs and symptoms are related to type and severity of the heart defect. Symptoms frequently present early in life, but it is possible for some CHDs to go undetected throughout life. [15]
The Blalock–Thomas–Taussig shunt (BTT shunt), [1] previously known as the Blalock–Taussig Shunt (BT shunt), [2] is a surgical procedure used to increase blood flow to the lungs in some forms of congenital heart disease [3] such as pulmonary atresia and tetralogy of Fallot, which are common causes of blue baby syndrome. [3]
4 Tetra- prefix: Tetralogy of Fallot; 5 Words: Total anomalous pulmonary venous return; A mainstem intubation with an endotracheal tube can lead to right-to-left shunting. [citation needed] This occurs when the tip of the endotracheal tube is placed beyond the carina. In this way only one lung is oxygenated and oxygen-poor blood from the non ...
Eisenmenger syndrome or Eisenmenger's syndrome is defined as the process in which a long-standing left-to-right cardiac shunt caused by a congenital heart defect (typically by a ventricular septal defect, atrial septal defect, or less commonly, patent ductus arteriosus) causes pulmonary hypertension [1] [2] and eventual reversal of the shunt into a cyanotic right-to-left shunt.
In tetralogy of Fallot, episodes in which infants become cyanotic are called tet spells, typically occurring during feeding or crying. [18] When older, children may squat to feel relief since this increases the systemic vascular resistance causing more blood to go towards the lungs, resulting in increased oxygenation. [18]
The most typical form of APVS is a tetralogy of Fallot variant, [4] however, case studies have linked APVS to several different congenital cardiac syndromes, such as agenesis of ductus arteriosus, [5] persistent ductus arteriosus, [6] atrioventricular septal defect, [7] pulmonary branching abnormalities, [8] [9] transposition of the great arteries, [10] and type B interrupted aortic arch. [11]
Tetralogy of Fallot is actually the most common cause of cyanotic congenital heart defects, accounting for about 50-70%, as well as about 10% of all congenital heart defects in general. Now, it’s not quite clear why some babies develop TOF but it is associated with chromosome 22 deletions and DiGeorge syndrome.