At birth, when the lungs fill with oxygen and more blood flows to them, the foramen ovale closes and the right and left circulation begins to separate. If everything developed correctly, as the ductus arteriosus closes over the next few days, all is well. As the ductus arteriosus closes, flow into the aorta decreases. If the condition isn't treated, the formerly healthy-appearing baby slowly loses pulses, goes into shock, and dies. Treatment begins with recognizing the condition.
Some medications can keep the closing ductus open while other options are explored.
Surgery can sometimes preserve adequate blood flow to the body, but in the last 10-15 years heart transplant has become a commonly used treatment for this condition as well. Josh, I hope you're weren't really noxious, just nauseated. I'm sure dizziness confused the words for you. I also hope your nausea and dizziness improved within another few days, because otherwise concern about a serious head injury would increase. There are several ways we could discuss head injuries.