The main goal of this thesis is to investigate the possible factors playing a role in dilatation of the neo-aortic root in patients after ASO for TGA. Basic histological research as well as... Show moreThe main goal of this thesis is to investigate the possible factors playing a role in dilatation of the neo-aortic root in patients after ASO for TGA. Basic histological research as well as histological 3D reconstruction of the arterial roots has been combined with clinical investigation. The studies that resulted from this research form the basis of this thesis. We went __back to the roots__. Show less
The thesis provides new insights into advanced echocardiographic and magnetic resonance imaging techniques for comprehensive mechanical assessment of the right ventricle in healthy children and in... Show moreThe thesis provides new insights into advanced echocardiographic and magnetic resonance imaging techniques for comprehensive mechanical assessment of the right ventricle in healthy children and in pediatric patients with right ventricular dysfunction. It is shown that the right ventricle does not contract synchronously in the longitudinal direction and that this is related to right ventricular function. Various echocardiographic (Tissue Doppler imaging, Speckle tracking, 3D echocardiography) and magnetic resonance imaging techniques (Tissue Velocity imaging, 3D flow imaging) are validated for use in the right ventricle in pediatric patients. Show less
This thesis is separated in two parts (Part I and Part II) in which normal and abnormal heart development are studied and related to congenital heart disease, in particular to the etiology of... Show moreThis thesis is separated in two parts (Part I and Part II) in which normal and abnormal heart development are studied and related to congenital heart disease, in particular to the etiology of supraventricular arrhythmias in fetuses and neonates. Part I describes the development of the posterior heart field derived venous pole of the heart specifically in correlation to the role of Shox2 and podoplanin in that particular area. Furthermore, the developmental processes in this region seem to have an important role in the anlage of the cardiac conduction system and epicardial lineage development of the heart. In the second part of this thesis (Part II) the aetiology of a specific subtype of supraventricular tachycardias i.e. atrioventricular reentry tachycardias (AVRTs) are related to normal heart development in human and mouse. AVRTs are one of the most common types of tachyarrhythmias at the perinatal period of development. We demonstrate that perinatal AVRTs might be related to incomplete formation of the isolating annulus fibrosus resulting in the temporary persistence of accessory myocardial connections between the atria and ventricles. We furthermore, demonstrate the late outcome of fetal brady- and tachyarrhythmia cases. Show less
