Đặc điểm siêu âm tim đánh dấu mô nhĩ trái ở bệnh nhân suy tim có phân suất tống máu EF > 40%

Abstract

Objective: To describe speckle tracking echocardiographic characteristics of left atrium in patients with heart failure with preserved ejection fraction. Subject and method: The study was carried out on 47 patients who met the diagnostic criteria for HF EF > 40% and treated at 108 Military Central Hospital and underwent speckle tracking echocardiography and NT-proBNP test according to the protocol. Result: The average age of the study group was 67.04 ± 12.78, in which men were the predominant group, accounting for 78.7%. Left ventricular function was normal with EF of 53.23 ± 10.37%; Left ventricular filling function E/e' at high limit of 13.09 ± 6.03. In patients with HFEF (EF > 40%) with coronary artery disease, LA reservoir function was impaired (2-chamber LASr: 21.44 ± 6.21 vs 25.35 ± 6.23; p<0.05). HFEF patients with EF in the range of 40-49% have decreased left atrial contractility and reservoir function compared with patients with EF > 50% while conduction function was within normal range. Conclusion: In heart failure patients with preserved ejection fraction (EF > 40%), reservoir and contractility function significantly decreased in the group with EF 40-49%, the blood conduit function remained normal. Patients with coronary artery disease have impaired reservoir function. Diabetes and hypertension do not affect left atrial function in HFEF ( EF > 40%) patients.