The risk factors for death or readmission within 30 days after discharge are: history of atrial fibrillation (OR = 7.45), history of heart failure (OR = 1.15), NYHA IV at discharge (OR = 5.47), ectopic beat on electrocardiogram (OR = 7.13), atrial fibrillation on electrocardiogram (OR = 7.13), high E / A ratio (OR = 1.813), high average E / e' ratio (OR = 1.06), treatment with anticoagulants at discharge (OR = 4.55) and treatment with nitrate at discharge (OR = 2.69).