MIHALI, Klevis; MARKUS, Birgit; SCHIEFFER, Bernhard; BAUER, Marcus; KREUTZ, Julian. Thinking Outside the Box: Case Report of a Rare Quadricuspid Aortic Valve as an Underrecognized Cause of Heart Failure and Atrial Fibrillation. Journal of Medical Cases, [S. l.], 2025. DOI: 10.14740/jmc5153. Disponível em: https://jmc.elmerpub.com/index.php/jmc/article/view/5153.. Acesso em: 20 aug. 2025.