Right atrial mass
A middle-aged patient with well-controlled hypothyroidism presented with exertional dyspnoea for a few years. General and systemic examinations were within normal limits. The ECG and chest X-ray were essentially normal. A transthoracic and transoesophageal echocardiogram are shown in figure 1A–C, online supplemental videos 1–3. Ventricular function was normal, with no significant valvar stenosis or regurgitation. ### Supplementary video [heartjnl-2023-323588supp001.avi] ### Supplementary video [heartjnl-2023-323588supp002.avi] ### Supplementary video [heartjnl-2023-323588supp003.avi] Figure 1 (A) Two-dimensional transthoracic echocardiogram in apical four-chamber view; (B) 2D-transoesophageal echocardiogram in mid-oesophagal 117 degrees and 0 degrees (C) long-axis view. LA, left atrium; LV, left ventricle; RA, right atrium; RV, right ventricle. What is the next best step in the management? 1. Cardiac magnetic resonance imaging (CMRI) 2. Anticoagulation for 3 months and re-imaging 3. Tr