{"id":81227,"date":"2018-05-16T11:40:25","date_gmt":"2018-05-16T11:40:25","guid":{"rendered":"http:\/\/humanitasnet-new.local\/enciclopedia\/valva-pulmonara\/"},"modified":"2018-05-16T11:40:25","modified_gmt":"2018-05-16T11:40:25","slug":"valva-pulmonara","status":"publish","type":"enciclopedia","link":"https:\/\/humanitas-net.humweb.webiz.team\/ro\/wiki\/valva-pulmonara\/","title":{"rendered":"Valva pulmonar\u0103"},"content":{"rendered":"<h2 id=\"ce-este-valva-pulmonara\">Ce este valva pulmonar\u0103?<\/h2>\n<p>Valva pulmonar\u0103 este una din cele patru valve ale inimii. Are form\u0103 de semilun\u0103 \u0219i se afl\u0103 \u00eentre ventriculul drept \u0219i artera pulmonar\u0103. Valva pulmonar\u0103 este proiectat\u0103 pentru a se asigura c\u0103 s\u00e2ngele nu curge \u00eenapoi pe calea c\u0103tre inim\u0103, precum \u0219i pentru a asigura schimbul adecvat de oxigen \u0219i dioxid de carbon \u00een pl\u0103m\u00e2ni, pentru \u00eentregul organism.<\/p>\n<p>&nbsp;<\/p>\n<p>Inima este un organ \u00eemp\u0103r\u021bit \u00een mai multe p\u0103r\u021bi, care o ajut\u0103 s\u0103-\u0219i \u00eendeplineasc\u0103 func\u021bia principal\u0103: s\u0103 transporte s\u00e2nge bogat \u00een oxigen c\u0103tre restul corpului (celule, \u021besuturi \u0219i organe) pentru a-l hr\u0103ni, \u0219i s\u0103 primeasc\u0103 s\u00e2nge \u00eenc\u0103rcat cu dioxid de carbon, pentru a-l trimite la pl\u0103m\u00e2ni, unde are loc schimbul de oxigen.<\/p>\n<p>Valvele cardiace sunt structuri mici, responsabile pentru prevenirea curgerii s\u00e2ngelui \u00eenapoi, asigur\u00e2ndu-se c\u0103 sensul este \u00een direc\u021bia spre inim\u0103.<\/p>\n<p>&nbsp;<\/p>\n<p>Valva pulmonar\u0103 este compus\u0103 din trei membrane (cuspide), formate \u00een principal din colagen, \u0219i care au o form\u0103 de semilun\u0103. Valva se afl\u0103 pe un inel muscular, prin care este conectat\u0103 la peretele inimii. Un nodul fibros, plasat pe fiecare margine liber\u0103 a cuspidelor, \u00eenchide \u00een mod unilateral orificiul \u00een timpul contrac\u021biei ventriculare.<\/p>\n<p>&nbsp;<\/p>\n<p>Defectele congenitale ale valvei pulmonare pot afecta func\u021bia circula\u021biei cardiace. Stenoza valvei pulmonare este o afec\u021biune \u00een care fluxul de s\u00e2nge al inimii este deteriorat de valva pulmonar\u0103. Acest lucru are ca rezultat reducerea fluxului sanguin la nivelul pl\u0103m\u00e2nilor. Afec\u021biunea este, \u00een general, provocat\u0103 de boala cardiac\u0103 congenital\u0103, \u0219i poate fi tratat\u0103 prin valvuloplastia cu balon, o procedur\u0103 care l\u0103rge\u0219te o valv\u0103 din inim\u0103 care este \u00eengustat\u0103. Cu asisten\u021ba medical\u0103 adecvat\u0103, pot fi prevenite \u0219i alte complica\u021bii.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2 id=\"ce-functie-indeplineste-valva-pulmonara\">Ce func\u021bie \u00eendepline\u0219te valva pulmonar\u0103?<\/h2>\n<p>Inima este o pomp\u0103, care transport\u0103 s\u00e2nge bogat \u00een oxigen din pl\u0103m\u00e2ni \u00een celulele \u021besuturilor \u0219i ale organelor, \u00een schimbul s\u00e2ngelui \u00eenc\u0103rcat cu dioxid de carbon, care trebuie transformat. S\u00e2ngele oxigenat circul\u0103 spre organele \u0219i \u021besuturile din corp prin aort\u0103, artera care transport\u0103 hran\u0103 \u00eentregului corp, \u0219i care se \u00eemparte \u00een ramuri \u0219i capilare din ce \u00een ce mai mici. S\u00e2ngele \u00eenc\u0103rcat cu dioxid de carbon revine la nivelul inimii prin vene, fiind transformat \u00een oxigen.<\/p>\n<p>&nbsp;<\/p>\n<p>Valva pulmonar\u0103 supravegheaz\u0103 trecerea s\u00e2ngelui dezoxigenat \u00eentre ventriculul drept \u0219i artera pulmonar\u0103, asigur\u00e2nd func\u021bionarea sa \u00een prevenirea revenirii s\u00e2ngelui \u00eenapoi la pl\u0103m\u00e2ni.<\/p>\n<p>&nbsp;<\/p>\n<p>Ciclul cardiac este format din dou\u0103 faze: o faz\u0103 de relaxare (diastola) \u0219i o faz\u0103 de contrac\u021bie (sistola). \u00cen prima faz\u0103 (faza diastolic\u0103), valvele dintre atrii \u0219i ventricule sunt deschise, \u0219i \u00eentreaga inim\u0103 este relaxat\u0103. \u00cen acest stadiu, valvele semilunare sunt \u00eenchise, \u00eempiedic\u00e2nd intrarea s\u00e2ngelui \u00een paturile vasculare. \u00cen timpul celei de-a doua etape (faza sistolic\u0103), atriile \u0219i ventriculele se contracteaz\u0103 \u00eentr-un mod coordonat: mai \u00eent\u00e2i atriile (sistol\u0103 atrial\u0103) \u0219i apoi ventriculele (sistol\u0103). \u00cen timpul contrac\u021biei ventriculare, s\u00e2ngele este \u00eempins prin artera pulmonar\u0103, iar diferen\u021ba de presiune o \u00eenchide din nou dup\u0103 trecere. Frecven\u021ba fluxului valvei pulmonare \u00een condi\u021bii normale este egal\u0103 cu 75 cm pe secund\u0103.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"featured_media":0,"parent":0,"template":"","Example":[1792],"class_list":["post-81227","enciclopedia","type-enciclopedia","status-publish","hentry","enciclopedia_category-anatomie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Valva pulmonar\u0103 - Humanitas.net<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Valva pulmonar\u0103 - Humanitas.net\" \/>\n<meta property=\"og:description\" content=\"Ce este valva pulmonar\u0103? Valva pulmonar\u0103 este una din cele patru valve ale inimii. 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