{"id":"bff3c453c1cc","type":"article","url":"https://hartvaat.nl/2026/02/23/cysteuze-massa-bij-een-jonge-vrouw-met-atriumseptumdefect/","title":"Cysteuze massa bij een jonge vrouw met atriumseptumdefect","title_en":"Abnormal echocardiographic finding: what is the cystic mass in a young woman with secundum atrial septal defect","category":"algemeen","category_label":"Algemeen","professions":["cardioloog"],"tags":["gedilateerde-cardiomyopathie"],"journal":"Heart","doi":"http://heart.bmj.com/cgi/content/short/112/6/350?rss=1","source_url":"https://doi.org/http://heart.bmj.com/cgi/content/short/112/6/350?rss=1","authors":["Li","Y.","Ren","D.","Sun","D."],"significance":3,"published":"2026-02-23","source_date":"2026-02-23","image":"https://hartvaat.nl/global/img/e8315535d29a.webp","kennis":[],"congress":"","summary_en":"A diagnostic case of a woman in her thirties with an unexpected cystic mass identified on echocardiography in the setting of a secundum atrial septal defect, illustrating the differential diagnosis of intracardiac cystic lesions.","created":"2026-07-03T10:25:18Z","updated":"2026-07-03T13:24:44Z","licence":"Citeer vrij, met bronvermelding en een link naar hartvaat.nl (de url van het record). Samenvattingen zijn redactioneel werk van HartVaat; de oorspronkelijke publicaties blijven van hun uitgevers (doi). Geen medisch advies.","body_markdown":"Een vrouw van in de 30 werd opgenomen met hartkloppingen en kortademigheid. Echocardiografie toonde een onverwachte cysteuze massa bij een secundum-atriumseptumdefect. De diagnostische work-up en differentiaaldiagnose worden besproken.","abstract_original":"<sec id=\"s1\"><st>Clinical introduction</st> <p>A woman in her 30s was admitted to our hospital with palpitations and shortness of breath for 2 years. Auscultation revealed a grade 2&ndash;3/6 midsystolic murmur with a wide and fixed splitting S2. ECG indicated sinus tachycardia. Transthoracic echocardiography revealed a well-defined, fluid-filled, round cystic mass with a size of 40<FONT FACE=\"arial,helvetica\">x</FONT>50 mm near the criss-cross atrioventricular connection (<cross-ref type=\"fig\" refid=\"F1\">figure 1A, B</cross-ref>), accompanied by a secundum atrial septal defect (ASD) with a diameter of 25 mm (<cross-ref type=\"fig\" refid=\"F1\">figure 1C</cross-ref>).</p> <p> <fig loc=\"float\" id=\"F1\"><no>Figure 1</no><caption><p>Transthoracic echocardiogram. (A) The cystic mass in the end-diastolic phase, (B) the cystic mass in the end-systolic phase and (C) the secundum atrial septal defect.</p> </caption> <link locator=\"heartjnl-2025-327116f01\"></fig> </p></sec> <sec id=\"s2\"><st>Questio"}