Patient's question:
About 10 years ago, I had a magnetic resonance angiography and found a very small venous malformation in the forehead, which was likely congenital. Later, I went to the hospital to ask and was told it might fibrotize in a couple of years, so I didn't pay much attention to it. After that, there were no major symptoms, no headaches, just occasional dizziness, and no epilepsy symptoms. I just want to ask if it's not a big deal. What is a vascular malformation?Doctor's answer:
The ductus arteriosus is originally a normal blood passage between the pulmonary artery and the aorta during fetal development. At this time, the lungs are not capable of respiration, so the pulmonary artery blood originating from the right ventricle flows through the ductus into the descending aorta, while the left ventricular blood enters the ascending aorta. Therefore, the ductus is necessary for the special circulatory pattern during fetal development.After birth, the lungs expand and independently take over the gas exchange function. The pulmonary circulation and systemic circulation each perform their respective roles, and the ductus soon closes due to disuse. If it remains open, it forms a pathological condition known as patent ductus arteriosus (PDA).