Clinical features • Chest pain (10%)• ↑HR (46%) • No chest pain or overt CHF on admission• ↓HR (non-ICU) ↑HR (ICU)•CHF exacerbation • Sudden cardiac arrest (100%)• MI and arrhythmia (33%) • Chest pain • ↑HR (71.9%) (62.8%, 45.4%, 35.5%) • ↓BP (50.4%) (28.1%, 21.5%, 14.8% during the first, second, third week)↓HR, transient (14.9%) • Reversible cardiomegaly (10.7%), no clinical heart failure • Chest discomfort (7%) • Palpitations (4%)