Tetralogy of Fallot

Provided video talks about the four defects that make up Tetralogy of fallot, what is a tet spell, how squatting improves the symptoms in children affected by ToF and what major factors determine the severity of symptoms in this condition. Timeline: 0:00 - Introduction and blood flow through a normal heart 1:19 - First defect: Pulmonary stenosis 2:01 - Second defect: Right ventricular hypertrophy 3:06 - Third defect: VSD 3:43 - Fourth defect: Overriding aorta 4:15 - Right to left shunting 6:01 - Tet spell 6:33 - Squatting position 10:39 - Factors that determine the severity of the symptoms