RÉSUMÉ
Objective:To evaluate the left ventricular diastolic function and pulmonary congestion in patients with acute myocardial infarction (AMI) with preserved left ventricular ejection fraction (LVEF) by cardiopulmonary ultrasound (CPUS), and to explore the value of CPUS in predicting the occurrence of heart failure with preserved ejection fraction (HFpEF) in AMI patients with preserved LVEF during hospitalization.Methods:A total of eighty-four patients with AMI with preserved LVEF (≥50%) who received optimal emergency reperfusion therapy on admission at Beijing Chaoyang Hospital Affiliated to Capital Medical University from August 2021 to March 2022 were enrolled. All patients completed comprehensive cardiopulmonary ultrasonography within 12 hours after reperfusion therapy and LVEF, left atrial maximum volume(LAV), peak flow velocity of tricuspid valve regurgitation (V TR), peak flow velocity of mitral valve in early diastole (E), peak velocity of mitral valve annulus on septal side and left ventricular lateral side in early diastole and other conventional echocardiography parameters were obtained, and then the left atrial volume index (LAVI), the mean peak velocity of the mitral valve annulus on the septal side and left ventricular lateral side in early diastole (e′) and E/e′ were calculated; lung ultrasound parameters(the number of B lines) were obtained; the left ventricular global long-axis strain (GLS) was obtained using speckle tracking imaging (STE). The predictive power of CPUS parameters for HFpEF during hospitalization in AMI patients with preserved LVEF were analyzed. Results:①The incidence of HFpEF during hospitalization was 40.4% (34/84). ②The number of B lines and LAVI were independently correlated with the occurrence of HFpEF during hospitalization( P<0.05). ③The ROC curve analysis showed that the area under the curve (AUC) of the number of B lines and LAVI for predicting the occurrence of HFpEF during hospitalization were 0.766 and 0.690, respectively. The number of B lines combined with LAVI had the best predictive performance in predicting the occurrence of HFpEF during hospitalization, with the largest AUC of 0.903, which was significantly better than the number of B lines and LAVI ( P<0.05). Conclusions:The number of B lines combined with LAVI can effectively predict the occurrence of HFpEF during hospitalization in AMI patients with preserved LVEF, which is helpful to further improve the clinical management of AMI patients at risk of HFpEF.