This paper describes supraventricular cardiac arrhythmias and sick sinus syndrome in patients with univentricular heart defects, following Fontan procedure. The Fontan operation is a well established surgical procedure in which the right atrium is connected with the pulmonary artery. This technique relieves the functional problems resulting from having a univentricular heart and it is also asso...

The long term prognosis was studied in 50 patients treated for the sick sinus syndrome with pacemaker insertion. The mean age of the patients was 71 years. There were 31 females and 19 males in the series. Nine patients (18%) died during the average follow-up period of 19 months. Dizzy and syncopal episodes were abolished in most patients with pacemaker therapy. However only two of the nine pat...

A 40-year old man with a history of surgically corrected congenital infundibular pulmonal stenosis and subvalvular membranous aortic stenosis presented with symptomatic sick sinus syndrome. Sick sinus syndrome may be related to stretching of the atrioventricular node and bundle of His, often a result of changed hemodynamics due to the underlying congenital disease. Implantation of a DDDR pacema...

A synchronous ventricular activation (AVA), caused by right apical ventricular pacing (RAVP), results in the deterioration of both systolic and diastolic function. 2 Chronic RAVP under DDDR pacing mode in patients with sick sinus syndrome revealed a detrimental effect on left ventricular fractional shortening, left atrium dilation, and myocardial blood flow. 4 Furthermore, although the mechanis...