Univentricular Heart Clinical Trial
Official title:
Lymphatic Function and Interstitial Fluid Filtration in Patients With a Fontan Circulation From Brazil
It is suggested that the elevated central venous pressure in patients with a Fontan
circulation can provoke manifestation of lymphatic dysfunction, met as plastic bronchitis,
peripheral oedema and most feared protein-losing enteropathy (PLE).
An explorative study from our department at Aarhus University Hospital revealed that the
function of the lymphatic vasculature in 10 young Fontan patients with no complications was
abnormal compared to healthy controls. However, to further describe and confirm these
findings we had to investigate the lymphatic circulation in a larger, older and more
complicated group of Fontan patients.
The hypothesis is that, patients with a univentricular circulation have a reduced
functionality of the lymphatic vasculature and which predisposes them to developing
complications such as edema and PLE.
The study population is patients with a Fontan circulation followed at InCor Heart Institute
in Sao Paolo and Ribeirão Preto, Brazil. These were matched with and group of healthy
controls.
The functional state of superficial lymphatics in the lower leg will be investigated, using
near infrared fluorescence (NIRF) imaging. The capillary filtration of fluid and leakiness of
the capillaries will be measured using strain gauge plethysmography and the peripheral blood
flow will be measured using venous occlusion plethysmography. Furthermore, plasma
concentration of noradrenaline will be estimated.
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