In-hospital and late outcome of rescue versus primary percutaneous coronary intervention in patients with ST-segment elevation myocardial infarction

Atrial septal defect(ASD) is a common congenital heart disease and causes left-to-right shunting and significant right ventricular (RV) volume overload.
The goal of this study was to evaluate the influence of these hemodynamic changes on pulmonary venous flow pattern in young adults.
Complete echocardiographic examination was performed in a group of 40 young adults (agedAs opposed to healthy young individuals who showed distinct S and D waves with diastolic predominance in pulmonary vein Doppler, in patients with ASD a continuous flow with increased systolic peak that beganin systole and continued to the late diastole wasobserved. The RV systolic function increased compared to the control group.
In patients with ASD,the pattern of pulmonary veinsflow transforms into a single continuous antegrade wave with systolic dominance due topersistent shunting of left atrial blood in to right heart chambers as well as increased RV pump function on pulmonary vein(by means of ASD), SVC and IVC, and could be used as a screening method for the presence of secundum type ASDs in young adults.