الفهرس 
Anatomy of single ventricleOnly 14 pages are availabe for public view
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Abstract
S
urgical correction of the univentrivular heart is an achievement of the last 4-5 decades. A Fontan-type operation, involving connection of the systemic veins and pulmonary arteries without subpulmonary ventricle, is nowadays the only treatment option for patients with a functionally univentricular heart (UVH). The concept of univentricular heart moved from hearts with only one ventricle to hearts with two ventricles unable to sustain separately pulmonary and systemic circulations in sequence.
The Glenn shunt is palliative, not corrective. Depending on the diagnosis and the surgical era, the Glenn shunt may be the only palliation for the cyanotic patient, one of several palliative surgeries, or a step prior to corrective surgery or the Fontan form of total right heart bypass.
The current study was done to evaluate all patients post bi directional Glennn shunt presenting to Ain Shams university Hospital Cath lab for hemodynamic study. To assess the status of patients post bi-directional Glenn shunt as regard pulmonary pressure, aortopulmonary collaterals, veno venous collaterals, oxygen saturation and cardiac function of single functioning ventricle as indicator of Glenn shunt success and need of Fontan completion.
It included 51 patients post Glenn shunt referred for elective diagnostic cardiac catheterization (2013- 2015) in Ain Shams University Hospitals for pre-Fontan invasive hemodynamics assessment.
All patients were subjected to proper history taking, complete general and local examination, echocardiography assessment and cardiac catheterization assessment.
The current study found that there was no significant difference between different sites of Glenn shunt on the oxygen saturation. Also, presence of venous collaterals didn’t have significant effect on oxygen saturation or MPAP.
But there was significant difference between patients with previous operation and patients without previous operation on MPAP.
Low MPAP less than 15 mmHg is one of the parameters which should be considered in patients to be candidate for Fontan. We compared patients with MPAP more than or equal 15 mmHg and patients with MPAP less than 15 mmHg as regard different variables measured. There was no correlation between them.
Also, veno-venous collaterals in patients with Glenn shunt were believed to be a cause of significant comorbidity and therefore it was a point of active research in our study. We compared data of patients with veno-venous collaterals versus patients without veno-venous collateral. There was no correlation between them.