Sick Sinus Syndrome

also known as sino-atrial node dysfunction.Sick Sinus Syndrome

This is a rare condition in which the main pacemaker of the heart, the sinus node, fails to work properly. The sinus node may not send electrical signals fast enough, may skip some signals, or may send too many signals resulting in slow and/or fast heartbeats.

Many patients with this condition have a history of heart surgery such as closure of an atrial septal defect (ASD), Mustard-Senning operations for Transposition of the Great Arteries or a Fontan operation for single ventricle. Non-surgical causes include familial sinus node dysfunction, muscular dystrophy, complex congenital heart defects, inflammatory diseases, electrical disorders, hypothyroidism, medications and others.

Some patients may require implantation of a pacemaker if symptomatic or those with risk factors.

Our Mission

Children's Heart Specialists, PSC is committed to provide comprehensive pediatric cardiac services to infants, children and young adults. We strive to insure the highest quality in non-invasive cardiovascular testing. Our medical staff is committed to being board certified in pediatric cardiology and adult congenital heart disease.

Our goal is to provide the highest quality of care with compassion and respect to our patients and their families.

Accredited in Echocardiography


We do not give any medical advice or recommendations about you or your child's health in this website. The medical information that appears on this website is to be used as a general guide about heart defects and symptoms. Medical advice is discussed at the time of your consultation with Dr. Villafañe.