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Unformatted text preview: Heart Disease in Infants and Children Major fetal heart development= 4 th-7 th week Diagnosed in utero at 16 weeks via ultrasound. Over 35 types of defects identified. Congenital heart defects produce their effects through: abnormal shunting of blood & alterations in pulmonary blood flow. CHD CLASSIFICATION Acyanotic (most common) no cyanosis left-to-right shunts arterial to venous system shunt blood is recirculated through right side of heart back through lungs increased right ventricular volume and workload increased pulmonary blood vessel volume increased hydrostatic pressure on right side. Defects that increase resistance to aortic outflow increase left-to-right shunting Patent ductus arteriosus Ventricular & Atrial septal defects Endocardial cushion defects Pulmonary valve stenosis Coarctation of the aorta Cyanotic right-to-left shunts with obstruction as cyanotic disorders venous to the arterial system results in unoxygenated blood moving from the right side of the heart into the left side of the heart and then being ejected into the systemic circulation....
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- Spring '08
- Congenital heart defect, pulmonary artery, Left heart failure, pulmonary blood flow, Pulmonary Valve Stenosis