Adult patients with congenital heart disease and a systemic right ventricle are prone to develop late complications such as rhythm and conduction disorders and heart failure. This thesis aims to... Show moreAdult patients with congenital heart disease and a systemic right ventricle are prone to develop late complications such as rhythm and conduction disorders and heart failure. This thesis aims to clarify the pathophysiology of this condition and to explore diagnostic and treatment options. Chapter 2 describes asymmetry and heterogeneity in cardiac autonomic innervation. Chapters 3 and 4 describe ambulatory ECG-derived measures of cardiac autonomic function in patients with a systemic right ventricle, and show that these measures are related to outcomes such as supraventricular arrhythmias. In chapter 5, echocardiographic measures of systemic right ventricular function are compared with cardiac MRI. Chapter 6 describes the clinical course of patients long after atrial switch correction. Chapter 7 describes the first results of treatment of systemic right ventricular failure with sacubitril/valsartan: a.o. a small but significant improvement in systemic right ventricular function was seen. Chapter 8 describes the experience of the application of eHealth smart technology in the titration of sacubitril/valsartan in the same cohort. Chapter 9 reports the first two cases of implantation of a ventricular assist device in patients with systemic right ventricular failure. This thesis may form the base for ongoing research to improve outcome in this vulnerable group. Show less
Zandstra, T.; Kies, P.; Maan, A.; Man, S.C.; Bootsma, M.; Vliegen, H.; ... ; Jongbloed, M. 2020
Background: Patients with a systemic right ventricle are prone to develop heart failure. Abnormal heart rate variability (HRV), a measure of autonomic dysfunction, is associated with morbidity and... Show moreBackground: Patients with a systemic right ventricle are prone to develop heart failure. Abnormal heart rate variability (HRV), a measure of autonomic dysfunction, is associated with morbidity and mortality in patients with left ventricular failure. The association between HRV and supraventricular arrhythmias (SVTs), which are associated with adverse events in this population, was assessed.Methods: 24-Hour Holter recordings of patients with a systemic right ventricle and healthy controls were analysed in a retrospective cohort study. HRV was calculated and compared between groups. Correlation coefficients were determined for HRV variables and clinical characteristics. The relation between HRV and SVTs was investigated with linear regression.Results: The patient group included 29 patients (69%) late after Mustard or Senning correction for transposition of the great arteries, and 13 patients with congenitally corrected transposition of the great arteries (31%). The control group included 38 subjects. HRV was significantly lower in patients compared with controls. In the patient group, lower SDANN (standard deviation of the average NN intervals calculated over 5-minute intervals) was independently associated with a higher number of supraventricular arrhythmias (95% CI -0.03 to -0.0004, p = 0.045). In exploratory correlation analysis, several HRV variables correlated with echocardiographic systemic right ventricular function (rho = 0.36, p = 0.02 for SDANN), and exercise capacity (rho = 0.39, p = 0.05 for SDANN).Conclusion: In patients with a systemic right ventricle, HRV is lower compared with controls and (SDANN) is independently associated with supraventricular arrhythmias. Show less
