ASD overview and secundum ASD

ASD overview and secundum ASD Atrial septal defect (ASD) is the commonest congenital heart disease in the adult, barring of course bicuspid aortic valve. ASD being a post tricuspid shunt, development of pulmonary hypertension and Eisenmenger syndrome is delayed and survival to adult age group is common. Some even argue that pulmonary hypertension in ASD is primary pulmonary hypertension which the individual was otherwise destined to develop. Anyway pulmonary hypertension is likely to develop in ASD with large left to right shunt of long duration, though the severity of pulmonary hypertension is variable. Supra systemic pulmonary arterial pressures are possible in pre tricuspid shunts like ASD unlike in VSD where the pressure can go only up to systemic levels. This is because the pressure in both ventricles get equalized in the presence of an unrestricted VSD. Usual types of ASD are the commonest ostium secundum ASD and the less common varieties of ostium primum ASD and sinus venosus ASD. Sinus venosus ASD can be subdivided into superior vena cava type and inferior vena cava type. The former is associated with partial anomalous venous drainage of the right sided pulmonary veins to the junction of superior vena cava and right atrium. Another type of ASD is the coronary sinus type of defect near the opening of the coronary sinus. Secundum atrial septal defect Secundum ASD in the region of the fossa ovalis. There is usually a good rim of tissue of tissue all around, making it sui...
Source: Cardiophile MD - Category: Cardiology Authors: Tags: HBC Bimodal pattern of cyanosis in ASD ostium primum ASD ostium secundum ASD Secundum atrial septal defect sinus venosus ASD Spontaneous closure of ASD Source Type: blogs