Desenlace inesperado tras el diagnóstico de masa intracardiaca

We present the case of a patient who came to the Emergency Room with a heart failure clinic with a casual finding of a left atrial space-occupying mass in chest CT Angiography, in the context of de onset atrial fibrillation with rapid ventricular response and mitral stenosis moderate-severe rheumatism not known. An echocardiogram was performed with diagnostic doubts about the etiology of the mass (myxoma Vs atrial thrombus). Oral anticoagulation is initiated with systemic embolization and secondary multi-organ failure, with disappearance of the mass in the left atrium. The peculiarity of this clinical case lies in the difficulty involved in the differential diagnosis of atrial mass and the devastating consequences that may arise after initiating anticoagulation in these cases, despite being indicated by current clinical practice guidelines.