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Podzastawkowe zwężenie aorty u golden retrievera - Vetkompleksowo – serwis dla lekarzy weterynarii
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Wyszukaj w serwisie


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Podzastawkowe zwężenie aorty u golden retrievera. Forma mięśniowa – opis przypadku


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Zwężenie aorty (aortic stenosis) jest zwężeniem lub zmniejszeniem rozmiaru drogi odpływu z lewej komory pod zastawką (pierścień włóknisty lub mięśniowy), na wysokości zastawek lub nad nimi. Zwężenie podzastawkowe (SAS, subaortic stenosis) występuje najczęściej u psów. W tej wadzie warstwa włókien lub pierścień jest umieszczony tuż pod zastawkami półksiężycowatymi aorty (1). Wada utrudnia odpływ krwi z komory lewej, co powoduje wzrost ciśnienia skurczowego i skutkuje przerostem koncentrycznym (dośrodkowym) komory lewej.

Predyspozycję rasową do tego schorzenia zaobserwowano u bokserów, nowofundlandów, rottweilerów, golden retrieverów i owczarków niemieckich. W Polsce częściej występuje ona również u yorkshire terrierów (2). Niektóre rasy, np.: boksery, bulteriery czy golden retrievery, mają nieznacznie ograniczoną drogę odpływu z lewej komory, co prowadzi do wzrostu prędkości przepływu krwi przez zastawki bez innych zaburzeń strukturalnych (1).

Podzastawkowe zwężenie aorty nie zawsze występuje już w momencie urodzenia, ale rozwija się podczas pierwszych 3-8 tygodni życia (3). W przypadkach łagodnego lub średniego zwężenia aorty często brak jest objawów klinicznych, a podejrzenie zwężenia aorty pojawia się, gdy podczas rutynowego badania wykrywany jest skurczowy szmer sercowy (1).

W cięższych przypadkach może dochodzić do rozwoju takich objawów jak:

  • nietolerancja wysiłkowa,
  • osłabienie,
  • omdlenie, a także
  • objawów zastoinowej niewydolności serca.
  • [...]

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Mogą zainteresować Cię również


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Wizytówka firmy


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Sklep


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Poznaj nasze serwisy