Copyright © 2000 by the European Society of Cardiology.
Influence of atrial septal defect anatomy in patient selection and assessment of closure with the Cardioseal device. A three-dimensional transoesophageal echocardiographic reconstruction
Service de Cardiologie Pédiatrique, Hôpital Necker/Enfants-malades, Paris, France
revised June 29, 1999; accepted June 30, 1999
Abstract
Background The maximal diameter of the defect and the dimensions of the septal rims are essential parameters for the selection of optimal cases for device closure. Neither two-dimensional echocardiography nor balloon catheter sizing provide optimal data. Unique three-dimensional echocardiography might help to improve patient selection and assessment of results. Our aim was to optimize transcatheter closure of secundum type atrial septal defects using three-dimensional echocardiography.
Methods Sixteen patients enrolled in a protocol for atrial septal defect transcatheter closure with the Cardioseal device underwent transoesophageal two- and three-dimensional echocardiography. Maximal diameter and tissue rim of the atrial septal defect were measured and compared by both methods. In the 12 patients selected for closure, the balloon stretched diameter was compared to three-dimensional echocardiography measurements. Device placement was assessed by two- and three-dimensional echocardiography.
Results The shape of the atrial septal defect appeared variable on three-dimensional views: round in nine patients but complex (oval, raquet-shaped, multiple) in seven patients. The surface area of the atrial septal defect varied by 68±15% during the cardiac cycle. The correlation between atrial septal defect maximal diameters measured by two-dimensional transoesophageal echocardiography and three-dimensional echocardiography was better in round defects (y=1x+1·6, r=0·99) than in complex defects (y=0·7x–0·5, r=0·88). The antero-superior rim could only be properly assessed by three-dimensional echocardiography. In 12 patients the correlation between stretched diameter and three-dimensional echocardiography maximal diameter was poor (y=0·3x+13, r=0·41). After placement of the device, three-dimensional echocardiography enabled the mechanism of residual shunting to be understood in three patients.
Conclusions Dynamic three-dimensional echocardiography enhances the understanding of the anatomy and physiology of atrial septal defect and should be an important process in future initiatives for device closures.
Key Words: Atrial septal defect, transcatheter procedures, echocardiography, three-dimensional reconstruction
f1 Correspondence: Dr Philippe Acar, Service de Cardiologie Pédiatrique, Hôpital Necker/Enfants-malades 149, rue de Sèvres 75743, Paris cedex 15, France.
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