In experiments in dogs we studied the effect of antiaggregating agents on the patency of prosthetic vascular grafts (4 mm in diameter) and vein grafts, both placed in areas with a rate of flow ranging between 50-60 ml/min. All 6 prosthetic grafts became occluded in the nonmedicated controls, 1 of 5 prosthetic grafts remained patent for a prolonged period of time in dogs receiving 250 mg acetylsalicylic acid 3 times a day, while 5 of 6 prosthetic grafts remained patent in animals receiving an antiaggregating mixture. Follow-up studies showed that antiaggregating medication had no effect on the patency of vein grafts, but it prevented the formation of mural thrombi and subendothelial proliferation.
Hereditární hemoragická teleangiektázie (HHT), známá také jako Osler-Weber-Rendu syndrom, je dědičné onemocnění, způsobující abnormální tvorbu cév. Pacienti mají četné teleangiektázie, z nichž mohou krvácet. S přibývajícím věkem se u nich rozvíjí arteriovenózní malformace, vedoucí k masivním arteriovenózním zkratům a poškození orgánů, v nichž tyto malformace vznikají. U pacientů je nutno provádět skríninková vyšetření s cílem včasné detekce arteriovenózních malformací a v případě jejich detekce jejich specializované obvykle multidisciplinární léčby. Pokroky farmakologické léčby jsou zmíněny v dalším článku.Klíčová slova: hereditární hemoragická teleangiektázie, arteriovenózní malformace.Hereditary hemorrhagic telangiectasia (Osler-Weber-Rendu syndrome) Part I. Pathophysiology, clinical symptoms and recommend screening for vascular malformations Hereditary hemorrhagic telangiectasia (HHT), also known as Osler-Weber-Rendu syndrome, is an autosomal dominant disorder that causes abnormal blood vessel formation. Patients with HHT may have telangiectasias and later may develop arteriovenous malformations in various organs. Pacients suffer from many complications caused by the malformations and therefore by patients with HHT must by performed screening of this arteriovenous malformations. Optimal treatment of this malformations is best delivered throught a multidisciplinary approach. Farmacological treatment is described in next paper.
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