Transoesophageal echocardiography-guided balloon-assisted percutaneous closure of a large secundum atrial septal defect in a pregnant woman: a case report

Background: According to the 2018 European Society of Cardiology guidelines, atrial septal defect (ASD) closure can be performed during pregnancy but is rarely indicated. In this case, we demonstrate the viability of percutaneous balloon-assisted ASD closure without fluoroscopy in a pregnant woman. Case summary: woman who was 20 weeks pregnant had primary complaints of breathlessness [New York Heart Association functional class (NYHA fc) III and IV] for 1 week prior to admission. A transthoracic echocardiography showed a dilatation of the right atrium (RA), a dilated right ventricle, a dilated main pulmonary artery (28.1 mm), and an oval-shaped 22 × 33 mm-sized secundum ASD with a left-to-right shunt. Despite optimal pharmacological treatment, the NYHA fc persisted. Under transoesophageal echocardiography monitoring, we introduced a 40 mm Cera™ ASD Occluder (Lifetech, China) via the delivery sheath. The device was deployed in the usual position; however, despite numerous placement adjustments, the left atrium disc kept getting dislodged to the RA and could not engage correctly. Therefore, we decided to use a balloon-assisted approach using a sizing balloon of No. 34 mm. The device was successfully positioned, and a wiggle test was conducted to make sure that the device remained stable. The patient was able to give birth to the child normally several months later. Discussion: Despite the fact that pregnant women with ASD receive a very low dose of radiation, it is nevertheless recommended to avoid radiation because this demographic is particularly vulnerable to it. It is possible to treat a large ASD in pregnant women with a successful balloon-assisted approach.