Permanent transvenous pacemaker implantation in a patient wi
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Introduction:
Cardiovascular disease is the leading cause of mortality and mobility according to recent statistics. Adult congenital heart disease has become an important entity in the current cardiology practice due to the advances in pediatric cardiac care and improved survival. Commonly seen congenital heart conditions include septal and valvular defects. Cor triatriatum dextrum is an extremely rare congenital heart anomaly in which the right atrium is separated into two chambers by the persistence of the right sinus venosus valve. It is uncommon to encounter such patients requiring placement of a permanent pacemaker. We report the placement of a dual-chamber pacemaker through the transvenous approach in a patient with cor triatriatum dextrum. To our knowledge, there are no similar reports in the published literature.

Case report:
An 87-year-old woman presented to the hospital with complaints of dyspnea on exertion. She has no significant medical history other than prior cigarette smoking. On her arrival to the emergency room she was found to be in atrial fibrillation with rapid ventricular response. She was treated with heart rate control medications and anticoagulation. A transesophageal echocardiogram (TEE) was performed prior to cardioversion to normal sinus rhythm given poor rate control. This revealed the presence of a well-defined transverse membrane dividing the right atrium....

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4306205/
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