An Adult Case of Polysplenia Syndrome Associated with Sinus Node Dysfunction, Dextrocardia, and Systemic Venous Anomalies

A 54-year-old woman was referred to our hospital for symptomatic sinus bradyarrhythmia with a sinus pause of 8 seconds. She was diagnosed with dextrocardia during childhood and discovered to have heterotaxy syndrome when she had an appendectomy during her teenager years. Chest and abdominal examinations by computed tomography showed multiple spleens located on the right side and abnormal drainages of the superior and inferior vena cava. Left isomerism was diagnosed by bilaterally bilobed lungs. Because of a patent bilateral superior vena cava, pacemaker leads were implanted using the right cephalic vein approach. Her fainting symptoms disappeared after pacemaker implantation.