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Evaluation of atrial electromechanic delay and left atrial mechanical functions in the patients with secundum type atrial septal defect



Evaluation of atrial electromechanic delay and left atrial mechanical functions in the patients with secundum type atrial septal defect



Echocardiography 30(6): 699-705



The aim of our study was to evaluate atrial electromechanical delay (AEMD) and left atrial mechanical functions (LAMF) in the patients with secundum-type atrial septal defect (ASD). We included 72 patients with secundum type ASD in the study group and 35 gender and age-matched healthy volunteers for the control group. Maximal, minimal, and presystolic LA volumes were measured by modified Simpson method and indexed to the body surface area (BSA). Inter-AEMD, right and left intra-AEMD were measured from the lateral and septal mitral annulus and tricuspid annulus using tissue Doppler imaging (TDI). The age, gender, systolic and diastolic blood pressure, heart rate (HR), BSA, and body mass index (BMI) parameters were not significantly different between the groups. Left atrial active and total emptying fractions and conduit volumes were significantly lower in the patients with ASD compared with the control group (P = 0.006, P = 0.001, and P = 0.032, respectively). Total emptying volume was increased in patients with ASD (P = 0.021). Passive emptying volume and fraction and active emptying volumes were not different significantly between the groups (P > 0.05). The left intraatrial, right intraatrial, and inter-AEMDs were significantly longer in the ASD group (P = 0.032, P = 0.013, and P = 0.003, respectively). The left atrial reservoir and contractile pump functions are reduced; the left intraatrial, right intraatrial, and inter-AEMDs are increased in the patients with ASD.

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Accession: 036716173

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PMID: 23305270

DOI: 10.1111/echo.12101


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