Can a PDA get worse?

Can a PDA Worsen Over Time?

Yes, a patent ductus arteriosus (PDA) can indeed get worse if left untreated. Normally, the ductus arteriosus—a blood vessel that connects two major arteries near the heart—closes shortly after birth. But in some cases, it remains open, leading to a condition known as PDA.

When this vessel stays open, it allows oxygen-rich blood to flow abnormally from the aorta back into the pulmonary artery. This means blood can recirculate to the lungs instead of being pumped out to the body. As a result, the heart and lungs must work harder than normal to manage the extra volume.

Over time, this increased strain can lead to serious complications. The constant overload of blood in the lungs may trigger high blood pressure in the pulmonary arteries—a condition known as pulmonary hypertension. If unaddressed, this can permanently damage the lung vessels and weaken the heart muscle, potentially leading to heart failure.

Infants with larger PDAs are especially at risk, often showing symptoms like poor feeding, rapid breathing, or slow growth. However, some people with small PDAs may go years without noticeable issues—only to face complications later in life.

Early detection and treatment are key. Whether through medication in premature infants or minimally invasive procedures like catheter-based closure in older patients, closing the PDA can prevent long-term harm. For adults diagnosed later, intervention can still make a significant difference in heart and lung health.

So while a small PDA might seem harmless at first, it’s important not to ignore it. Regular check-ups and timely medical care can prevent a manageable issue from turning into a serious cardiovascular problem.