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Nadciśnienie płucne wywołane chorobami dróg oddechowych - Vetkompleksowo – serwis dla lekarzy weterynarii
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Wyszukaj w serwisie


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Nadciśnienie płucne wywołane chorobami dróg oddechowych


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Serce płucne (ang. cor pulmonale) nie jest samodzielną jednostką chorobową, lecz zespołem objawów prawostronnej niewydolności serca, które wynikają z chorób układu oddechowego lub zmian naczyniowych w tkance płucnej. Konsekwencją tych zaburzeń jest rozwinięcie się nadciśnienia płucnego (PH, ang. pulmonary hypertension) i przewlekłe przeciążenie prawej strony serca. Celem niniejszej pracy jest dokonanie przeglądu mechanizmów odpowiadających za prawokomorową niewydolność serca związaną z chorobami górnych i dolnych dróg oddechowych.

Patofizjologia nadciśnienia płucnego

Nadciśnienie płucne jest stanem, w którym średnie spoczynkowe ciśnienie w tętnicy płucnej mierzone w spoczynku, podczas cewnikowania prawego serca, osiąga lub przekracza wartość 25-30 mmHg (1). Nadciśnienie płucne definiuje się jako nieprawidłowo zwiększone ciśnienie w układzie naczyniowym płuc. Kryterium rozpoznawania PH jest bezpośrednia ocena tętniczego ciśnienia płucnego (PAP, ang. pulmonary arterial pressure) przez cewnikowanie prawego serca (RHC, ang. right heart cardiac catheterization), a w medycynie człowieka PH zdefiniowano jako średnie PAP ≥ 25 mmHg w spoczynku. Ze względu na inwazyjny charakter badania nie jest ono wykonywane rutynowo w medycynie weterynaryjnej (2). Podwyższone PAP nie jest charakterystyczną cechą konkretnego stanu klinicznego, ale raczej nieprawidłowym stanem hemodynamicznym związanym z licznymi, różnorodnymi zaburzeniami. Podwyższone PAP przy braku zwiększonego oporu naczyniowego płuc (PVR, ang. pulmonary vascular resistance) (2) ma wiele przyczyn. Podwyższone ciśnienie płucne związane ze zwiększonym oporem naczyniowym PVR przy braku zwiększonego ciśnienia w lewym przedsionku określane jest prekapilarnym nadciśnieniem płucnym. Może rozwinąć się w przebiegu licznych chorób, rzadziej pojawia się bez uchwytnej przyczyny i wówczas określane jest [...]

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Mogą zainteresować Cię również


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Wizytówka firmy


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Sklep


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