{"id":8040,"date":"2021-04-12T11:40:44","date_gmt":"2021-04-12T10:40:44","guid":{"rendered":"https:\/\/www.heartfailurematters.org\/att-forsta-hjartsvikt\/vad-ar-ejektionsfraktion-hfref-och-hfpef\/"},"modified":"2022-01-19T14:41:26","modified_gmt":"2022-01-19T14:41:26","slug":"vad-ar-ejektionsfraktion-hfref-och-hfpef","status":"publish","type":"page","link":"https:\/\/www.heartfailurematters.org\/sv\/att-forsta-hjartsvikt\/vad-ar-ejektionsfraktion-hfref-och-hfpef\/","title":{"rendered":"Vad \u00e4r ejektionsfraktion? (HFrEF och HFpEF)"},"content":{"rendered":"<p>Hj\u00e4rtsvikt orsakas oftast av att hj\u00e4rtat inte pumpar tillr\u00e4ckliga m\u00e4ngder blod. Under tr\u00e4ning m\u00e5ste b\u00e5de puls och m\u00e4ngden blod som pumpas ut med varje hj\u00e4rtslag \u00f6ka f\u00f6r att uppfylla kraven fr\u00e5n muskler i arbete. Minskad tr\u00e4ningskapacitet och andn\u00f6d intr\u00e4ffar n\u00e4r hj\u00e4rtats pumpf\u00f6rm\u00e5ga \u00e4r otillr\u00e4cklig f\u00f6r att tillgodose kroppens behov av blod. <strong>Ejektionsfraktionen<\/strong> (EF) \u00e4r den procentandel av blodet i v\u00e4nster hj\u00e4rtkammare som pumpas ut med varje hj\u00e4rtslag. EF kan l\u00e4tt uppskattas med hj\u00e4lp av ekokardiografi. N\u00e4r EF minskar p\u00e5 grund av en skada p\u00e5 hj\u00e4rtmuskeln, till exempel efter en hj\u00e4rtattack, \u00e4r hj\u00e4rtmuskelns sammandragning svagare och pumpf\u00f6rm\u00e5gan f\u00f6rs\u00e4mras. Otillr\u00e4cklig t\u00f6mning av v\u00e4nster kammare, som \u00e4r den huvudsakliga pumpkammaren, har \u00e4ven till f\u00f6ljd att v\u00e4tska bildas i lungorna (blodstockning) och kan orsaka andn\u00f6d p\u00e5 grund av hj\u00e4rtats of\u00f6rm\u00e5ga att t\u00f6mma kamrarna ordentligt.<\/p>\n<p>Det finns andra orsaker till nedsatt\/f\u00f6rs\u00e4mrad hj\u00e4rtfunktion, till exempel n\u00e4r hj\u00e4rtkammarens f\u00f6rm\u00e5ga att slappna av \u00e4r f\u00f6rs\u00e4mrad, trots att hj\u00e4rtats pumpf\u00f6rm\u00e5ga och EF \u00e4r normalt.<\/p>\n<p>Symtom och tecken p\u00e5 hj\u00e4rtsvikt p\u00e5 grund av minskad EF kallas <strong>HFrEF<\/strong> eller hj\u00e4rtsvikt med minskad EF. N\u00e4r en patient har liknande symtom och tecken som vid HFrEF, men har en normal EF, anv\u00e4nds ist\u00e4llet termen <strong>HFpEF<\/strong> (hj\u00e4rtsvikt med bevarad ejektionsfraktion) f\u00f6r att beskriva tillst\u00e5ndet.<\/p>\n<p>N\u00e4r symtom och tecken p\u00e5 hj\u00e4rtsvikt upptr\u00e4der med bibeh\u00e5llen EF anv\u00e4nds termen <strong>HFrEF<\/strong> eller hj\u00e4rtsvikt med minskad EF. Normal ejektionsfraktion \u00e4r vanligtvis cirka 70 %. EF under 40 % r\u00e4knas som nedsatt (HFrEF), medan ett v\u00e4rde \u00f6ver 40 % r\u00e4knas som bevarad EF (HFpEF). M\u00e5nga patienter har en EF mellan 40 och 49 %, vilket r\u00e4knas som l\u00e4tt nedsatt. P\u00e5 senare tid har man b\u00f6rjat tala om den h\u00e4r l\u00e4ttare s\u00e4nkningen av EF som HFmrEF, eller hj\u00e4rtsvikt med en mellankategori av EF.<\/p>\n<h2>Varf\u00f6r \u00e4r termen ejektionsfraktion viktig?<\/h2>\n<p>Utv\u00e4rdering av ejektionsfraktion har anv\u00e4nts i l\u00e4kemedelsstudier under de senaste decennierna, d\u00e4r man fr\u00e4mst har inriktat sig p\u00e5 patienter med HFrEF. F\u00f6rst nyligen har vi insett hur vanligt f\u00f6rekommande hj\u00e4rtsviktssymtom p\u00e5 grund av nedsatt avslappning av hj\u00e4rtmuskeln (HFpEF) \u00e4r, i motsats till minskad sammandragningsf\u00f6rm\u00e5ga (HFrEF). Dessa olika patientgrupper kr\u00e4ver vanligtvis n\u00e5got olika l\u00e4kemedelsbehandling. I och med att merparten av forskningen om behandling har utf\u00f6rts p\u00e5 patienter med HFrEF, \u00e4r bel\u00e4ggen f\u00f6r att behandlingen \u00e4r effektiv b\u00e4st f\u00f6r dessa patienter och rekommendationerna i behandlingsriktlinjerna \u00e4r d\u00e4rf\u00f6r starkast f\u00f6r patienter med HFrEF. P\u00e5 senare tid har det dock funnits ett stort intresse f\u00f6r forskning om den effektivaste behandlingen av patienter med HFpEF. F\u00f6r n\u00e4rvarande grundar sig behandlingen p\u00e5 att behandla individens symtom.<\/p>\n<p>Denna enkla eng\u00e5ngsm\u00e4tning av EF genom ekokardiografi \u00e4r ett anv\u00e4ndbart verktyg f\u00f6r kliniker som vill utforma en individuell hanteringsplan f\u00f6r patienter med hj\u00e4rtsvikt.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hj\u00e4rtsvikt orsakas oftast av att hj\u00e4rtat inte pumpar tillr\u00e4ckliga m\u00e4ngder blod. Under tr\u00e4ning m\u00e5ste b\u00e5de puls och m\u00e4ngden blod som pumpas ut med varje hj\u00e4rtslag \u00f6ka f\u00f6r att uppfylla kraven fr\u00e5n muskler i arbete. Minskad tr\u00e4ningskapacitet och andn\u00f6d intr\u00e4ffar n\u00e4r hj\u00e4rtats pumpf\u00f6rm\u00e5ga \u00e4r otillr\u00e4cklig f\u00f6r att tillgodose kroppens behov av blod. Ejektionsfraktionen (EF) \u00e4r den [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":10652,"parent":2421,"menu_order":7,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"categories":[124],"tags":[],"class_list":["post-8040","page","type-page","status-publish","has-post-thumbnail","hentry","category-understanding-heart-failure-sv"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.8.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Vad \u00e4r ejektionsfraktion? 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