Trilogy of Fallot

Trilogy of Fallot (pronunciation: tri-lo-gee of fa-lo) is a rare congenital heart defect that is a variant of the more commonly known Tetralogy of Fallot. It is characterized by three key anatomical abnormalities in the heart: pulmonary stenosis, ventricular septal defect, and right ventricular hypertrophy.

Etymology

The term "Trilogy of Fallot" is derived from the name of the French physician Étienne-Louis Arthur Fallot, who first described the condition in the late 19th century. The prefix "tri-" refers to the three characteristic heart defects present in this condition.

Pulmonary Stenosis

Pulmonary stenosis is a condition where the flow of blood from the right ventricle of the heart to the pulmonary artery is obstructed. This obstruction can occur at the valve itself (valvular stenosis), above the valve (supravalvular stenosis), or below the valve (subvalvular stenosis).

Ventricular Septal Defect

A ventricular septal defect is a hole in the wall (septum) that separates the heart's lower chambers (ventricles) and allows blood to pass from the left to the right side of the heart. The oxygen-rich blood then gets pumped back to the lungs instead of out to the body, causing the heart to work harder.

Right Ventricular Hypertrophy

Right ventricular hypertrophy is a condition where the muscle wall of right ventricle of the heart becomes thickened and enlarged. This is usually a response to increased resistance or high blood pressure in the lungs.

Related Terms

External links

Medical encyclopedia article on Trilogy of Fallot
Wikipedia's article - Trilogy of Fallot

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Trilogy of Fallot