It is possible for an unclosed arterial duct to heal spontaneously, but there is no definite probability due to various factors.
The spontaneous healing of an unclosed ductus arteriosus is related to the thickness of the unclosed vessel and the condition of the child. For example, an unclosed ductus arteriosus with a small unclosed diameter or an unclosed ductus arteriosus with a progressively smaller diameter and a progressively lower blood flow rate observed during follow-up may heal spontaneously.
In general, the chance of closure is higher at 1 year of age, and the chance of spontaneous healing is lower at 2 years of age, while surgical treatment, such as transcatheter interventions, should be considered for those who fail to heal spontaneously after 3 years of age. Arterial ductus arteriosus can be asymptomatic in mild cases, but can lead to heart failure in severe cases.
Parents are advised to follow up with their children and seek medical attention if palpitations, shortness of breath, or fatigue occur.