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Objective: The application of real-time three-dimensional echocardiography (RT-3DE) and two-dimensional speckle tracking imaging (STI) technical evaluation of paroxysmal atrial fibrillation in patients with left atrium (left atrial, LA) volume and myocardial motion and deformation functions; and The before and after treatment of radiofrequency catheter ablation of left atrial remodeling and functional changes followed, to investigate the value of the STI in the evaluation of left atrial myocardial function, and radiofrequency catheter ablation of paroxysmal atrial fibrillation in patients with left atrial morphology and function, in order to guide clinical treatment and prognosis. Method: 1) were selected 30 cases of normal subjects and 30 patients RF ablation in patients with paroxysmal atrial fibrillation. Routine ultrasound echocardiography, all patients were in sinus rhythm at the check, respectively, using the conventional two-dimensional ultrasound, Doppler spectrum, real-time three-dimensional echocardiography acquisition cardiac structure parameters, mitral, pulmonary venous flow spectrum, left atrial volume index and left atrial strain rate curve parameters between the two groups; 2) Select accept radiofrequency catheter ablation for paroxysmal atrial fibrillation in 30 patients, application of echocardiography and intraoperative ablation After three days, three months resting sinus rhythm left atrial diameters, mitral flow spectrum E wave and A wave velocity, E wave and A wave velocity ratio (E / A), and pulmonary vein flow spectrum S wave, D-wave and A wave velocity. Application of RT-3DE calculation the the left atrial largest volume (LAVmax), left atrial minimum volume (LAVmin) the volume (LAVp) left atrial contraction, left atrial passive ejection fraction (LAPEF) was active left atrial ejection fraction (LAAEF); Applications STI technology for each segment of the left atrial wall strain rate curve, respectively measuring SRe SRa of. Results: 1) Compared with the normal control group, the various segments of the radiofrequency ablation group left atrial wall SRs SRe and SRa lower left atrial posterior wall base, intermediate and heart segment the SRa significantly reduce the radiofrequency ablation group mLASRa LAAEF was a significant positive correlation; 2) compared with before surgery, RF ablation 3 days left atrial wall of each segment the SRs, SRe and SRa decreased; 3 months after left atrial anterior wall, under the wall, atrial septal the basal and middle segments the SRa and a SRe increased and, SRs the no significant difference, LAVmax, LAVp, and LAVmin reduce, LAPEF, and LAAEF higher. Conclusion: 1. Overall two-dimensional speckle tracking technology can be non-invasive and quantitative evaluation of the left atrium in patients with paroxysmal atrial fibrillation and Home myocardial dysfunction. Paroxysmal atrial fibrillation in patients with left atrial volume increases, the peak left atrial wall strain rate to reduce the left atrium and auxiliary pump function pipeline functionality and savings functions mutually compensatory role diminished or disappeared. Radiofrequency ablation after three days, was significantly lower in the strain rate compared with the preoperative room walls of each segment, suggesting that left atrial function in a \Partially improved three months after RF ablation, left atrial remodeling and function in patients with paroxysmal atrial fibrillation, left atrial reservoir function to reduce the auxiliary pump function and increased pipeline function.
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