A 66-year-old woman presents with worsening exertional dyspnoea and peripheral oedema. A preliminary clinical diagnosis of heart failure is made. Her echo is shown in Figs 13.1 and 13.2 and Videos 13.1, 13.2, 13.3, 13.4, 13.5, 13.6, 13.7, 13.8, 13.9 and 13.10.