Coaching is training or development in which a person called a coach supports a learner in achieving a specific personal or professional goal. The learner is sometimes called a coachee.
From Wikipedia: Tetralogy of Fallot (TOF) is a congenital heart defect which is classically understood to involve four anatomical abnormalities (although only three of them are always present). It is the most common cyanotic heart defect, representing 55-70%, and the most common cause of blue baby syndrome..
Cyanosis by definition is a bluish discoloration due to the presence of an increased quantity of desaturated. hemoglobin in the tissues. In our current era of congenital heart disease, cyanosis is generally due to right-to left shunting through.