How it works? Transcatheter closure of Atrial Septal Defect (ASD) An atrial septal defect (ASD) is a congenital heart defect that involves a hole in the atrial septum. This is the muscular wall that separates the two upper chambers (atria) of the heart. Every child is born with an opening between the upper heart chambers. It's a normal fetal opening that allows blood to detour away from the lungs before birth. After birth, the opening is no longer needed and usually closes or becomes very small

Atrial development. Embryology. Interatrial septal development. Right atrium and sinus venosus Right atrium and pulmonary veins Fate of sinus venosus Development of the left atrium Smooth vs pectinate parts of the atria | Drbeen

🧠 What are Signs and Symptoms of Autism Spectrum Disorder (ASD)? Autism Spectrum Disorder (ASD) affects how individuals communicate, interact, and process the world around them. Recognising the signs and symptoms is an important step toward understanding and supporting those with ASD. From challenges with social communication to sensory sensitivities, autism presents uniquely in every individual. At Unisson, we believe that with awareness and understanding, we can create an inclusive society th