Differentiation Value of Left Atrial Dysfunction in Reperfused Chronic Myocardial Infarction

Evaluation of left atrial dysfunction is of great value to assess reperfused chronic myocardial infarction. LA volumetric and strain parameters can be of great help to estimate left atrial function. However, limited data are accessed on its prognostic value in reperfused chronic myocardial infarction. Purpose: In order to evaluate the relationship between LA volumetric and strain parameters in patients with chronic myocardial infarction. Materials and methods: In this retrospective study, recruited people(included from April in 2017 to the June in 2021) experience cardiovascular MRI. The relationship between LA volumetric and strain parameters and chronic myocardial infarction was evaluated by linear regression. Results: 83 patients with chronic myocardial infarction(mean age±standard deviation, 58.16 years±9.58; 69men) were included. LATEF was weakly correlated with LAVmin(Pearson correlation coefficient r=-0.674, P＜0.001), Booster longitudinal strain(r=0.577, P＜0.001), GLSRa(r=-0.567, P＜0.001), Total longitudinal strain(r=0.574, P＜0.001). Better passive radial strain is correlated to a lower rate of chronic myocardial infarction(hazard ratio, 0.789[0.699,0.892]; P＜0.001) after adjusting for multiple clinical and CMR-based variables. Conclusion: Left atrial volumetric parameters, strain and strain rate can be of great value in reperfused chronic myocardial infarction.