Iatrogenic Atrial Septal Defect After Percutaneous Mitral Valve Repair With the MitraClip System
2017
This study examines the incidence of iatrogenic atrial septal defect (iASD) after the MitraClip procedure and its influence on echocardiographic and clinical outcomes. We examined 96 patients who underwent a successful MitraClip procedure and who also had baseline and 1-year postprocedure transthoracic echocardiograms. At 1-year follow-up, iASD were observed in 24% of cases. Compared with the patients without iASD, the patients with iASD had a larger right atrium and greater severity of tricuspid regurgitation (TR) at baseline. After the MitraClip procedure, mitral regurgitation lessened significantly in both groups. Although right atrial area and right ventricular diameters increased significantly in patients with iASD (25.3 ± 8.0 to 28.3 ± 9.5 cm 2 , 39.7 ± 7.1 to 42.2 ± 8.1 mm, p
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