Types of Cardiovascular Complication 3. Non-shunting Pulmonary stenosis Not usually progressive 2) Aortic stenosis rare: its outcome is bad 3) Marfan's syndrome(genetic disorder MyXomatous degeneration of the heart valves mitral and cystic medial necrosis(囊性中层 坏死) of the aorta(aneurysms动脉瘤) death rate: 496-50%0Types of Cardiovascular Complication 3. Non-shunting 1) Pulmonary stenosis Not usually progressive 2) Aortic stenosis rare; its outcome is bad 3) Marfan’s syndrome (genetic disorder) Myxomatous degeneration of the heart valves; mitral and cystic medial necrosis（囊性中层 坏死） of the aorta (aneurysms动脉瘤) death rate: 4%-50%