MHD - #12 - congenital heart defects

Question 1

tetralogy of fallot (4)

Answer 1

4/ TETRALOGY of FALLOT:
Pulmonary stenosis
right ventricular hypertrophy
VSD
overriding aorta

Question 2

What are the 3 reasons pulmonary HTN may occur?

Answer 2

1. flow beyond pulmonary distensibility of lung vasculature
2. Vasoconstriction of palm. vas. bed
3. Secondary pathologic changes in intimate and media of the muscular arteries and arterioles of the lungs restricting the pulmonary bed

Question 3

What is the #1 cause of pulmonary HTN due to congenital abnormalities?

Answer 3

LARGE VSD

next PDA, then ASD least