NGHIÊN CỨU THỜI GIAN KÍCH HOẠT NHĨ TRÁI TOÀN BỘ Ở NGƯỜI BÌNH THƯỜNG BẰNG SIÊU ÂM DOPPLER MÔ CƠ TIM

Abstract

Introduction: The total left atrial activation time (PA-TDI) is the time required for the electrical signal to travel from the initial activation point to the furthest point of the atrium. This time can be measured by myocardial tissue doppler echocardiography, it has the ability to predict the occurrence of atrial fibrillation in high-risk patients, and it is also affected by age, hypertension, diabetes, BMI... Objectives: 1/ to investigate the normal value of total left atrial activation time, 2/ to evaluate the impact of some physiological factors on total left atrial activation time in normal people. Methods: 69 people without cardiovascular disease and without important cardiovascular risk factors (hypertension, diabetes) underwent electrocardiography and myocardial tissue doppler echocardiography to determine total left atrial activation time. These people will be divided into groups according to age (age <40, age 40-60 and over 60 years old), comparing the differences between groups and analyzing linear regression between PA-TDI and some clinical and echocardiographic parameters. Results - Conclusion: The mean value of PA-TDI in the study group is 88.3±15.1 ms. PA-TDI has a positive correlation with age (r=0.26, p=0.03).