401
edits
Grown-up Congenital Heart Disease (GUCH): Difference between revisions
Jump to navigation
Jump to search
Grown-up Congenital Heart Disease (GUCH) (view source)
Revision as of 15:01, 25 January 2012
, 25 January 2012→1.2.4 Pathophysiology
| Line 66: | Line 66: | ||
:: Muscular defects (type 4) are located within the trabecular septum and accounts for 5 – 20% of all VSDs. It is bordered only by muscle, away from the cardiac valves. Muscular defects can be small or large in size and consist of a single or multiple defects. | :: Muscular defects (type 4) are located within the trabecular septum and accounts for 5 – 20% of all VSDs. It is bordered only by muscle, away from the cardiac valves. Muscular defects can be small or large in size and consist of a single or multiple defects. | ||
==== | ==== Pathophysiology ==== | ||
The severity of the shunt across the VSD is determined by its size and the ratio of pulmonary to systemic vascular resistance. In small or restrictive VSDs the diameter of the defect is ≤25% of the aortic annulus diameter. These small defects cause small left to right shunts with no left ventricular overload or pulmonary hypertension. | The severity of the shunt across the VSD is determined by its size and the ratio of pulmonary to systemic vascular resistance. In small or restrictive VSDs the diameter of the defect is ≤25% of the aortic annulus diameter. These small defects cause small left to right shunts with no left ventricular overload or pulmonary hypertension. | ||