Role of cardiac magnetic resonance in assessment of atrial septal defect.

Congress:

ECR 2020

Poster Number:

C-01785

Type:

Educational Exhibit

Keywords:

Not applicable, Congenital, Technical aspects, Imaging sequences, MR, Cardiovascular system, Cardiac

Authors:

M. R. M. K. Ibrahim¹, S. romeih²; ¹Cairo/EG, ²Aswan/EG

DOI:

10.26044/ecr2020/C-01785

DOI-Link:

https://dx.doi.org/10.26044/ecr2020/C-01785

Fig. 1: Diagram shows normal development of the interatrial septum. septum primum...

Fig. 2: Illustration of interatrial septum from right atrial perspective shows...

Fig. 7: Diagram of an ASD demonstrating the hemodynamics as the number of arrows in...

Fig. 3: The red arrow surround the Ostium Primum ASD, as it appear as a large defect in...

Learning objectives

Tounderstand the embryology of the inter-atrial septum and different Atrial septal defects (ASD). To understand the hemodynamics of atrial septal defect (ASD). To know the role of MRI as a non invasive technique for quantification of shunt either directly or indirectly as well as detection of shuntsequelae as ( right side dilatation, pulmonary hypertension)and associated anomalies (as partial abnormal pulmonary venous drainage) if present . To learn how to use different magnetic resonance imaging (MRI) sequences for better visualization of flow direction across the ASD.

Background

ASD is one of the common congenital heart diseases (CHD), it represent about 40% of adult CHD. Embryology Background: The interatrial septum (IAS) is the structure whichdivides the primary atrium into the right and left atriums. From the 5th to 7th week of gestation, the septum primum (SP) start to develop and grows towards the endocardial cushions (EC). Before fusion of this septum with the EC, small perforations develop at its cranial portion and coalesce together forming ostium secundum (OS). During that time, A second...

Findings and procedure details

Echocardiography is the primary diagnostic tool for ASDs, however it can easily missASD especially in adults. Cardiac Magnetic Resonance (CMR) has inherent advantages over the traditionally used modalities.As it is a non invasive modality with high sptial resolutionand large field of view without exposure to ionizing radiation.It can provide adequate anatomical and accurate functional informations Evaluation of ASDs should provide the following informations; Definition of location ( type) , delineating the margins of the defect , measuring the size. Accurate quantification of the RV& LV...

Conclusion

These highlight the role of MRI in diagnosis of ASD especially in adults; asMRI could be considered as one stop shop for adequate morphological and accurate functional assessment of ASD.

Personal information and conflict of interest

Mary R. M. K. Ibrahim; Cairo/EG - nothing to disclose S. Romeih; Aswan/EG - nothing to disclose

References

Baltar B. N., Álvarez M. R. and Avila C. S., et al. "Cardiovascular shunts: types and MR assessment" ECR 2013. Austria center Vienna, Austria. Poster presentation. Ganigara M, Tanous D. and Celermajer D. et al. " The role of cardiac MRI in the diagnosis and management of sinus venosus atrial septal defect", Annals of Pediatric Cardiology 7( 2) P 160-162, 2014 Geva T, Martins J.D. and Wald R. M., "Atrial septal defects", The Lancet 2014,383,9932, P 1921-1932, 2012. Park M. K.: Pathophysiology of left to...