الفهرس 
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Abstract
In the general population, atrial fibrillation (AF) is considered to be the most frequent persistent arrhythmia and is recognised as the leading cause of stroke and other thromboembolic events . Left atrial analysis utilizing speckle tracking is a novel technique for evaluating the left atrial mechanical function. This study objective is to evaluate the left atrial function utilizing speckle tracking echocardiography (STE) in patients with low risk non valvular atrial fibrillation (AF) and make a comparison with high-risk AF individuals and a control group, as well as detection of the association between LA strain utilizing speckle tracking echocardiography and CHA2DS2 - VASc score.
Objective: To compare the left atrial function utilising speckle tracking echocardiography in patients with low-risk and high-risk non-valvular atrial fibrillation.
Methods: The descriptive, cross-sectional study was conducted at the cardiology department of Kafrelsheikh University Hospital, Egypt, from January 2021 to January 2022, and comprised low-risk atrial fibrillatin participants in group I, high-risk atrial fibrillatin patients in group II, and healthy controls in group III. After detailed medical history, the subjects underwent 12-lead electrocardigram, and echocardiographic assessment, including two dimensional, M-mode, tissue doppler, and speckle tracking of the left atrial. The association of left atrial strain with Congestive heart failure, hypertension, age ≥75 (doubled), diabetes, stroke (doubled), vascular disease sex category (female) score was explored. Data was analysed using SPSS 28.
Results: Of the 90 subjects, there were 30(33.3%) in each of the 3 groups. The mean age among the groups was significantly different among the groups (p=0.014). Left atrial ejection fraction and left atrial strain had an overall significant difference among the groups (p<0.001). Congestive heart failure, hypertension, age ≥75 (doubled), diabetes, stroke (doubled), vascular disease sex category (female) score was negatively correlated with Left atrial ejection fraction and (p<0.001) and left atrial strain (p<0.001).
Conclusion: In individuals with atrial fibrillatin, there was a significant decrease in left atrial strain and left atrial function. The use of speckle tracking echocardiography allowed for a more detailed analysis of left atrial mechanics. The correlation of left atrial strain strain and left atrial ejection fraction with Congestive heart failure, hypertension, age ≥75 (doubled), diabetes, stroke (doubled), vascular disease sex category (female) score was significantly negative.