{"id":2284,"date":"2025-12-23T16:02:40","date_gmt":"2025-12-23T13:02:40","guid":{"rendered":"https:\/\/wiki.dev.voka.io\/diseases\/uncategorized\/cardiomiopatia-restritiva\/"},"modified":"2025-12-23T16:02:46","modified_gmt":"2025-12-23T13:02:46","slug":"cardiomiopatia-restritiva","status":"publish","type":"diseases_post","link":"https:\/\/wiki.dev.voka.io\/pt\/doencas\/cardiologia\/cardiomiopatia-restritiva\/","title":{"rendered":"Cardiomiopatia restritiva: etiologia, patog\u00e9nese, sintomas, diagn\u00f3stico, m\u00e9todos de tratamento"},"content":{"rendered":"<p><?xml encoding=\"UTF-8\" ?><\/p>\n<p>A cardiomiopatia restritiva (CMR) \u00e9 uma forma rara de cardiomiopatias prim\u00e1rias ou secund\u00e1rias, caracterizada por comprometimento do enchimento diast\u00f3lico do ventr\u00edculo esquerdo e\/ou direito com fun\u00e7\u00e3o sist\u00f3lica e espessura da parede normais ou quase normais. Ao mesmo tempo, o aumento da rigidez mioc\u00e1rdica leva ao aumento da press\u00e3o diast\u00f3lica e insufici\u00eancia card\u00edaca congestiva.<\/p>\n<p>Esta condi\u00e7\u00e3o requer um diagn\u00f3stico diferencial complexo, uma vez que pode ser causada por uma variedade de raz\u00f5es, desde dist\u00farbios gen\u00e9ticos a doen\u00e7as sist\u00e9micas.<\/p>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dev_wiki_voka_io_303011\/articles\/en\/cardiology\/restrictive-cardiomyopathy\/lv-cavity-restrictive-cmp.webp\" alt=\"Cavidade do ventr\u00edculo esquerdo com cardiomiopatia restritiva resultante de fibrose endomioc\u00e1rdica\"><figcaption class=\"wp-element-caption\">Cavidade do ventr\u00edculo esquerdo com cardiomiopatia restritiva resultante de fibrose endomioc\u00e1rdica \u2013<a href=\"https:\/\/catalog.voka.io\/en\/models\/d1df170c-51ef-4d23-93b5-0380d03866e5\/7b0d0575-5bd2-4294-a1a7-c720c52b9654\/075ceff0-6f2e-42b4-a838-5397f2edea6b\/2a1626e7-2835-44f1-bef7-d41940a2b834\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"> modelo 3D<\/a><\/figcaption><\/figure>\n<h2 class=\"wp-block-heading\" id=\"causas-da-cardiomiopatia-restritiva\"><strong>Causas da cardiomiopatia restritiva<\/strong><\/h2>\n<p>A doen\u00e7a pode ser idiop\u00e1tica (prim\u00e1ria) ou secund\u00e1ria em rela\u00e7\u00e3o a processos sist\u00e9micos ou infiltrativos. As principais causas da cardiomiopatia restritiva podem ser divididas em v\u00e1rios grupos:<\/p>\n<ol class=\"wp-block-list\">\n<li><strong>Doen\u00e7as infiltrativas:<\/strong>\n<ul class=\"wp-block-list\">\n<li>A amiloidose (formas AL e ATTR) \u00e9 a causa mais comum nos adultos.<\/li>\n<li>A sarcoidose \u00e9 uma les\u00e3o granulomatosa do mioc\u00e1rdio, que leva \u00e0 rigidez e a perturba\u00e7\u00f5es da condu\u00e7\u00e3o.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Doen\u00e7as de dep\u00f3sito:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Doen\u00e7a de Fabry (defici\u00eancia da \u03b1-galactosidase A).<\/li>\n<li>A hemocromatose \u00e9 o dep\u00f3sito de ferro no mioc\u00e1rdio, que leva \u00e0 fibrose.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Les\u00f5es induzidas por radia\u00e7\u00e3o e quimioterapia:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Efeitos t\u00f3xicos dos antraciclinos (por exemplo, doxorrubicina).<\/li>\n<li>Sequelas da radioterapia mediast\u00ednica.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Les\u00f5es endomioc\u00e1rdicas:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Fibrose endomioc\u00e1rdica.<\/li>\n<li><strong>A miocardiopatia restritiva de L\u00f6ffler<\/strong> (endocardite hipereosinof\u00edlica) \u00e9 uma les\u00e3o t\u00f3xica do cora\u00e7\u00e3o por eosin\u00f3filos.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Doen\u00e7as sist\u00eamicas:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Esclerodermia, l\u00fapus eritematoso sist\u00e9mico.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>Em alguns casos, a etiologia n\u00e3o pode ser determinada, sendo essa forma denominada idiop\u00e1tica.<\/p>\n<h2 class=\"wp-block-heading\" id=\"patogenese-e-classificacao\"><strong>Patog\u00e9nese e classifica\u00e7\u00e3o<\/strong><\/h2>\n<p>O principal mecanismo de desenvolvimento da cardiomiopatia restritiva \u00e9 a diminui\u00e7\u00e3o da complac\u00eancia (elasticidade) do mioc\u00e1rdio com fun\u00e7\u00e3o sist\u00f3lica preservada ou ligeiramente reduzida. As paredes ventriculares tornam-se r\u00edgidas e n\u00e3o conseguem relaxar completamente durante a di\u00e1stole.<\/p>\n<p>Isso desencadeia uma complexa sequ\u00eancia de rea\u00e7\u00f5es patol\u00f3gicas:<\/p>\n<ol class=\"wp-block-list\">\n<li><strong>Aumento da press\u00e3o de enchimento:<\/strong> As paredes r\u00edgidas dos ventr\u00edculos exigem elevada press\u00e3o de enchimento, o que conduz inevitavelmente a congest\u00e3o venosa nos pulm\u00f5es e na circula\u00e7\u00e3o sist\u00e9mica.<\/li>\n<li><strong>Diminui\u00e7\u00e3o do d\u00e9bito card\u00edaco:<\/strong> Devido ao enchimento limitado, o volume sist\u00f3lico e o d\u00e9bito card\u00edaco diminuem, mesmo com uma fra\u00e7\u00e3o de eje\u00e7\u00e3o normal. <\/li>\n<li><strong>Fun\u00e7\u00e3o dos \u00e1trios:<\/strong> A diminui\u00e7\u00e3o do enchimento dos ventr\u00edculos provoca um aumento compensat\u00f3rio da press\u00e3o auricular. Isto leva a uma dilata\u00e7\u00e3o atrial significativa, \u00e0 diminui\u00e7\u00e3o da \u201ccontribui\u00e7\u00e3o auricular\u201d para o enchimento ventricular e ao agravamento dos sintomas de insufici\u00eancia card\u00edaca. <\/li>\n<li><strong>Fibrose e remodela\u00e7\u00e3o:<\/strong> Desenvolvem-se como consequ\u00eancia da sobrecarga cr\u00f3nica de press\u00e3o, contribuindo para a progress\u00e3o do fen\u00f3tipo restritivo.<\/li>\n<li><strong>Arritmias<\/strong>:<br \/>\nFrequentemente desenvolvem-se fibrila\u00e7\u00e3o atrial, bloqueios AV, bradicardias, especialmente em casos de amiloidose ou sarcoidose, que afetam o sistema de condu\u00e7\u00e3o. Al\u00e9m disso, aumenta o risco de trombose.<\/li>\n<\/ol>\n<p>No final da cadeia patogen\u00e9tica, desenvolve-se insufici\u00eancia card\u00edaca diast\u00f3lica refrat\u00e1ria (n\u00e3o controlada) com baixo d\u00e9bito card\u00edaco, m\u00e1 resposta \u00e0 terapia padr\u00e3o e alto risco de tromboembolismo.<\/p>\n<h3 class=\"wp-block-heading\" id=\"caracteristicas-da-patogenese-para-cada-forma-individual\"><strong>Caracter\u00edsticas da patog\u00e9nese para cada forma individual<\/strong><\/h3>\n<p>Os mecanismos de les\u00e3o dependem da etiologia:<\/p>\n<ul class=\"wp-block-list\">\n<li><strong>Na amiloidose:<\/strong> a deposi\u00e7\u00e3o de prote\u00ednas entre os cardiomi\u00f3citos provoca fibrose e dist\u00farbios de condu\u00e7\u00e3o.<\/li>\n<li><strong>Na doen\u00e7a de Fabry:<\/strong> o ac\u00famulo intracelular de glicosfingolip\u00eddios leva \u00e0 disfun\u00e7\u00e3o das pr\u00f3prias c\u00e9lulas (disfun\u00e7\u00e3o mioc\u00edtica).<\/li>\n<li><strong>Na sarcoidose:<\/strong> a inflama\u00e7\u00e3o granulomatosa \u00e9 substitu\u00edda por tecido fibroso, causando arritmias.<\/li>\n<\/ul>\n<p id=\"h-\u043a\u043b\u0430\u0441\u0441\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f-\u0440\u0435\u0441\u0442\u0440\u0438\u043a\u0442\u0438\u0432\u043d\u043e\u0439-\u043a\u0430\u0440\u0434\u0438\u043e\u043c\u0438\u043e\u043f\u0430\u0442\u0438\u0438\"><strong>Classifica\u00e7\u00e3o da cardiomiopatia restritiva<\/strong><\/p>\n<figure class=\"wp-block-table table-to-cards\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th class=\"has-text-align-center\" data-align=\"center\"><strong>Tipos de CMR<\/strong><\/th>\n<th class=\"has-text-align-center\" data-align=\"center\"><strong>Descri\u00e7\u00e3o<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>Prim\u00e1ria (idiop\u00e1tica)<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\">A les\u00e3o \u00e9 limitada pelo mioc\u00e1rdio, a causa \u00e9 desconhecida<\/td>\n<\/tr>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>Infiltrativa<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\">Acumula\u00e7\u00e3o de subst\u00e2ncias patol\u00f3gicas (por exemplo, amil\u00f3ide) no espa\u00e7o intercelular<\/td>\n<\/tr>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>Doen\u00e7as de dep\u00f3sito<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\">Acumula\u00e7\u00e3o de metabolitos (ferro, glicog\u00e9nio) no interior das c\u00e9lulas<\/td>\n<\/tr>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>Endomioc\u00e1rdica<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\">Fibrose da camada interna (por exemplo, doen\u00e7a de Leffler)<\/td>\n<\/tr>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>Provocada pela radioterapia e quimioterapia<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\">Les\u00e3o do mioc\u00e1rdio devido \u00e0 exposi\u00e7\u00e3o a radia\u00e7\u00e3o ionizante e\/ou cardiotoxicidade induzida pela quimioterapia<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2 class=\"wp-block-heading\" id=\"manifestacoes-clinicas\"><strong>Manifesta\u00e7\u00f5es cl\u00ednicas<\/strong><\/h2>\n<p>Os sintomas da cardiomiopatia restritiva est\u00e3o principalmente associados \u00e0 disfun\u00e7\u00e3o diast\u00f3lica e \u00e0 congest\u00e3o venosa, que se manifestam da seguinte forma:<\/p>\n<ul class=\"wp-block-list\">\n<li><strong>Falta de ar:<\/strong> inicialmente durante o esfor\u00e7o f\u00edsico (devido ao enchimento insuficiente do ventr\u00edculo esquerdo), depois em repouso.<\/li>\n<li><strong>Ortopneia:<\/strong> falta de ar na posi\u00e7\u00e3o deitada, edema pulmonar (congest\u00e3o na circula\u00e7\u00e3o pulmonar).<\/li>\n<li><strong>S\u00edndrome do edema:<\/strong> incha\u00e7o das veias jugulares, edema perif\u00e9rico das pernas, ascite.<\/li>\n<li><strong>Sintomas de d\u00e9bito card\u00edaco diminu\u00eddo:<\/strong> fadiga intensa, fraqueza, hipotens\u00e3o ortost\u00e1tica e desmaios.<\/li>\n<li><strong>Dist\u00farbios do ritmo card\u00edaco:<\/strong> a fibrilha\u00e7\u00e3o auricular \u00e9 uma complica\u00e7\u00e3o comum que agrava o estado do paciente.<\/li>\n<li><strong>Tromboembolias:<\/strong> o risco de acidente vascular cerebral \u00e9 elevado devido \u00e0 estagna\u00e7\u00e3o do sangue nos \u00e1trios dilatados e \u00e0 arritmia.<\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\" id=\"diagnostico\"><strong>Diagn\u00f3stico<\/strong><\/h2>\n<p>O diagn\u00f3stico da CMR requer uma abordagem abrangente para excluir a pericardite constritiva e identificar a causa da doen\u00e7a.<\/p>\n<h3 class=\"wp-block-heading\" id=\"analises-clinicas\"><strong>An\u00e1lises cl\u00ednicas<\/strong><\/h3>\n<ul class=\"wp-block-list\">\n<li><strong>NT-proBNP ou BNP:<\/strong> elevados (n\u00e3o espec\u00edficos, marcadores da gravidade da insufici\u00eancia card\u00edaca).<\/li>\n<li><strong>Troponinas:<\/strong> podem estar moderadamente elevadas em formas infiltrativas (amiloidose), mesmo sem isquemia.<\/li>\n<li><strong>Exames de rastreio:<\/strong> Amil\u00f3ide A s\u00e9rica, eletroforese de prote\u00ednas sangu\u00edneas, imunoglobulinas (exclus\u00e3o de amiloidose AL e outras paraproteinemias), ferro e ferritina (hemochromatose), atividade GLA (doen\u00e7a de Fabry).<\/li>\n<\/ul>\n<h3 class=\"wp-block-heading\" id=\"metodos-instrumentais\"><strong>M\u00e9todos instrumentais<\/strong><\/h3>\n<p><strong>1. Ecocardiografia (EcoCG)<\/strong><strong><br \/><\/strong>Na ecocardiografia, a miocardiopatia restritiva apresenta caracter\u00edsticas espec\u00edficas:<\/p>\n<ul class=\"wp-block-list\">\n<li>espessamento das paredes com volume ventricular normal ou reduzido;<\/li>\n<li>dilata\u00e7\u00e3o auricular, especialmente do \u00e1trio esquerdo;<\/li>\n<li>rigidez do VE, enchimento diast\u00f3lico restritivo (rela\u00e7\u00e3o E\/A elevada);<\/li>\n<li>fra\u00e7\u00e3o de eje\u00e7\u00e3o preservada (diminui apenas nos est\u00e1gios finais);<\/li>\n<li>na amiloidose: um sinal espec\u00edfico de preserva\u00e7\u00e3o apical \u00abapical sparing\u00bb (redu\u00e7\u00e3o da deforma\u00e7\u00e3o longitudinal com preserva\u00e7\u00e3o do segmento apical).<\/li>\n<\/ul>\n<p><strong>2. Eletrocardiografia (ECG)<\/strong><strong><br \/><\/strong> A CMR no ECG manifesta-se frequentemente como ondas de baixa voltagem, fibrila\u00e7\u00e3o atrial, bloqueios AV e arritmias ventriculares.<\/p>\n<p><strong>3. Resson\u00e2ncia magn\u00e9tica card\u00edaca com gadol\u00ednio (realce tardio pelo gadol\u00ednio)<\/strong><strong><br \/><\/strong>Padr\u00e3o ouro para visualiza\u00e7\u00e3o de infiltra\u00e7\u00e3o e fibrose:<\/p>\n<ul class=\"wp-block-list\">\n<li>A acumula\u00e7\u00e3o de contraste subendoc\u00e1rdico \u00e9 t\u00edpica da amiloidose.<\/li>\n<li>A fibrose focal \u00e9 t\u00edpica da sarcoidose.<\/li>\n<li>A aus\u00eancia de acumula\u00e7\u00e3o espec\u00edfica \u00e9 caracter\u00edstica da forma idiop\u00e1tica.<\/li>\n<\/ul>\n<p><strong>4. Cateterismo card\u00edaco (hemodin\u00e2mica invasiva)<\/strong><\/p>\n<p>\u00c9 utilizado para medir a press\u00e3o nas c\u00e2maras card\u00edacas. Permite diferenciar a CMR da pericardite constritiva (pela diferen\u00e7a de press\u00e3o nos ventr\u00edculos durante a respira\u00e7\u00e3o), o que \u00e9 fundamental para a escolha das estrat\u00e9gias de tratamento.<\/p>\n<p><strong>5. M\u00e9todos complementares<\/strong><\/p>\n<ul class=\"wp-block-list\">\n<li><strong>Bi\u00f3psia do mioc\u00e1rdio:<\/strong> O m\u00e9todo apresenta certos riscos, mas permite verificar de forma precisa a natureza infiltrativa ou inflamat\u00f3ria das altera\u00e7\u00f5es.<\/li>\n<li><strong>Exame PYP (cintilografia 99mTc-PYP):<\/strong>\u00c9 uma ferramenta diagn\u00f3stica bastante sens\u00edvel da amiloidose ATTR. Diferencia-a da forma AL.<\/li>\n<li><strong>FDG-PET:<\/strong> revela inflama\u00e7\u00e3o ativa na sarcoidose.<\/li>\n<li><strong>TC card\u00edaca:<\/strong> para excluir calcifica\u00e7\u00e3o do peric\u00e1rdio (pericardite constritiva).<\/li>\n<\/ul>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dev_wiki_voka_io_303011\/articles\/en\/cardiology\/restrictive-cardiomyopathy\/emc-fibrosis-restrictive-cmp.webp\" alt=\"Fibrose endomioc\u00e1rdica que causou o desenvolvimento de CMR\"><figcaption class=\"wp-element-caption\">Fibrose endomioc\u00e1rdica que causou o desenvolvimento de CMR<a href=\"https:\/\/catalog.voka.io\/en\/models\/d1df170c-51ef-4d23-93b5-0380d03866e5\/7b0d0575-5bd2-4294-a1a7-c720c52b9654\/075ceff0-6f2e-42b4-a838-5397f2edea6b\/2a1626e7-2835-44f1-bef7-d41940a2b834\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"> \u2013 modelo 3D<\/a><\/figcaption><\/figure>\n<div class=\"social-banner-block\">\n<div class=\"social-banner-content\">\n<p class=\"h5-title text-black\">Encontra mais conte\u00fados cientificamente exactos nas nossas redes sociais<\/p>\n<p><span class=\"social-banner-text text-grey\">Subscreve e n\u00e3o percas os recursos mais recentes<\/span><\/p>\n<div class=\"social-links-wrapper\"><a class=\"social-icon-link\" href=\"https:\/\/www.facebook.com\/VOKA3DAnatomyAndPathology\/\" target=\"_blank\" rel=\"nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dev_wiki_voka_io_303011\/common\/Social%20Icons\/facebook.svg\" alt=\"social link\"><\/a><a class=\"social-icon-link\" href=\"https:\/\/www.instagram.com\/voka.io\/\" target=\"_blank\" rel=\"nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dev_wiki_voka_io_303011\/common\/Social%20Icons\/insta.svg\" alt=\"social link\"><\/a><a class=\"social-icon-link\" href=\"https:\/\/www.linkedin.com\/company\/voka-io\/posts\/?feedView=all\" target=\"_blank\" rel=\"nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dev_wiki_voka_io_303011\/common\/Social%20Icons\/linkedin.svg\" alt=\"social link\"><\/a><a class=\"social-icon-link\" href=\"https:\/\/www.youtube.com\/@vokaio\" target=\"_blank\" rel=\"nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dev_wiki_voka_io_303011\/common\/Social%20Icons\/youtube.svg\" alt=\"social link\"><\/a><a class=\"social-icon-link\" href=\"https:\/\/www.pinterest.com\/voka3danatomyandpathology\/\" target=\"_blank\" rel=\"nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dev_wiki_voka_io_303011\/common\/Social%20Icons\/pinterest.svg\" alt=\"social link\"><\/a><a class=\"social-icon-link\" href=\"https:\/\/www.tiktok.com\/@voka.io\" target=\"_blank\" rel=\"nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dev_wiki_voka_io_303011\/common\/Social%20Icons\/tiktok.svg\" alt=\"social link\"><\/a><a class=\"social-icon-link\" href=\"https:\/\/discord.gg\/7ejUpq8DRR\" target=\"_blank\" rel=\"nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dev_wiki_voka_io_303011\/common\/Social%20Icons\/discord.svg\" alt=\"social link\"><\/a><\/div>\n<\/div>\n<p><img decoding=\"async\" class=\"social-banner-image\" loading=\"lazy\" src=\"https:\/\/storage.googleapis.com\/dev_wiki_voka_io_303011\/common\/social-media-banner-mobile-image.webp\" alt=\"Banner background\"><\/div>\n<h2 class=\"wp-block-heading\" id=\"tratamento-da-cardiomiopatia-restritiva\"><strong>Tratamento da cardiomiopatia restritiva<\/strong><\/h2>\n<p>As guidelines atuais dividem a terapia em sintom\u00e1tica e espec\u00edfica (direcionada \u00e0 causa).<\/p>\n<h3 class=\"wp-block-heading\" id=\"terapia-medicamentosa\"><strong>Terapia medicamentosa<\/strong><\/h3>\n<ul class=\"wp-block-list\">\n<li><strong>Diur\u00e9ticos de al\u00e7a<\/strong> (furosemida, torasemida): tratamento sintom\u00e1tico da insufici\u00eancia card\u00edaca congestiva. Reduzem a congest\u00e3o, mas requerem cautela para n\u00e3o diminuir o d\u00e9bito card\u00edaco.<\/li>\n<li><strong>Betabloqueadores e antagonistas do c\u00e1lcio:<\/strong> s\u00e3o usados para controlar a frequ\u00eancia card\u00edaca em casos de taquicardia (com cuidado em casos de amiloidose).<\/li>\n<li><strong>Anticoagulantes:<\/strong> s\u00e3o obrigat\u00f3rios em casos de fibrila\u00e7\u00e3o atrial para prevenir tromboses.<\/li>\n<\/ul>\n<h3 class=\"wp-block-heading\" id=\"terapia-especifica\"><strong>Terapia espec\u00edfica<\/strong><\/h3>\n<ul class=\"wp-block-list\">\n<li><strong>Para amiloidose ATTR:<\/strong> Tafamidis.<\/li>\n<li><strong>Para a amiloidose AL:<\/strong> quimioterapia (bortezomib, ciclofosfamida), transplante de medula \u00f3ssea.<\/li>\n<li><strong>Na doen\u00e7a de Fabry:<\/strong> terapia com chaperona farmacol\u00f3gica (migalastate) e terapia de reposi\u00e7\u00e3o enzim\u00e1tica (agalsidase alfa\/beta).<\/li>\n<li><strong>Para a sarcoidose:<\/strong> glicocortic\u00f3ides (prednisolona) e imunossupressores (metotrexato, azatioprina).<\/li>\n<li><strong>Para a hemocromatose:<\/strong> quelantes de ferro (deferoxamina).<\/li>\n<\/ul>\n<h3 class=\"wp-block-heading\" id=\"tratamento-cirurgico\"><strong>Tratamento cir\u00fargico<\/strong><\/h3>\n<ul class=\"wp-block-list\">\n<li><strong>Implante de marcapasso:<\/strong> em casos de bradicardia grave e bloqueios AV.<\/li>\n<li><strong>Implanta\u00e7\u00e3o de cardioversor-desfibrilhador implant\u00e1vel (CDI):<\/strong> para a preven\u00e7\u00e3o da morte s\u00fabita card\u00edaca (especialmente ap\u00f3s epis\u00f3dios de taquicardia ventricular e nas formas cicatriciais de sarcoidose).<\/li>\n<li><strong>Transplante card\u00edaco:<\/strong> indicado para insufici\u00eancia card\u00edaca grave refrat\u00e1ria em doentes jovens sem les\u00e3o sist\u00e9mica de \u00f3rg\u00e3os.<\/li>\n<\/ul>\n<div>\n<h2 class=\"faq-title h2-article\" id=\"faq\">FAQ<\/h2>\n<div class=\"faq-section\">\n<div class=\"faq-item faq-answer-hidden\">\n<div class=\"question-block\">\n<div class=\"faq-question\">\n<p class=\" text-black h5-title\">1. O que \u00e9 a cardiomiopatia restritiva e como difere de outras formas?<\/p>\n<\/div>\n<div class=\"faq-answer text-main-text-color main-text-medium\">A CMR \u00e9 uma condi\u00e7\u00e3o em que o mioc\u00e1rdio se torna r\u00edgido, perdendo a sua capacidade de relaxar. Por exemplo, ao contr\u00e1rio da forma dilatada, na CMR o tamanho das c\u00e2maras card\u00edacas geralmente n\u00e3o aumenta e a fun\u00e7\u00e3o sist\u00f3lica permanece preservada durante um longo per\u00edodo.<\/div>\n<\/div>\n<div class=\"expand-button-wrapper\"><button class=\"text-accent expand-button\">+<\/button><\/div>\n<\/div>\n<div class=\"faq-item faq-answer-hidden\">\n<div class=\"question-block\">\n<div class=\"faq-question\">\n<p class=\" text-black h5-title\">2. Quais s\u00e3o os sintomas da CMR?<\/p>\n<\/div>\n<div class=\"faq-answer text-main-text-color main-text-medium\">Falta de ar, fadiga, edema, distens\u00e3o da veia jugular e ascite. Esses sintomas est\u00e3o associados \u00e0 estagna\u00e7\u00e3o do sangue nas circula\u00e7\u00f5es pulmonar e sist\u00e9mica devido \u00e0 disfun\u00e7\u00e3o diast\u00f3lica.<\/div>\n<\/div>\n<div class=\"expand-button-wrapper\"><button class=\"text-accent expand-button\">+<\/button><\/div>\n<\/div>\n<div class=\"faq-item faq-answer-hidden\">\n<div class=\"question-block\">\n<div class=\"faq-question\">\n<p class=\" text-black h5-title\">3. A CMR pode ser uma doen\u00e7a heredit\u00e1ria?<\/p>\n<\/div>\n<div class=\"faq-answer text-main-text-color main-text-medium\">Sim. Algumas formas, como a amiloidose transtiretina (ATTRv), t\u00eam natureza gen\u00e9tica.<\/div>\n<\/div>\n<div class=\"expand-button-wrapper\"><button class=\"text-accent expand-button\">+<\/button><\/div>\n<\/div>\n<div class=\"faq-item faq-answer-hidden\">\n<div class=\"question-block\">\n<div class=\"faq-question\">\n<p class=\" text-black h5-title\">4. \u00c9 poss\u00edvel curar completamente a doen\u00e7a?<\/p>\n<\/div>\n<div class=\"faq-answer text-main-text-color main-text-medium\">Na maioria dos casos, a doen\u00e7a \u00e9 progressiva. No entanto, com a identifica\u00e7\u00e3o atempada de causas revers\u00edveis (por exemplo, sarcoidose, miocardite eosinof\u00edlica), \u00e9 poss\u00edvel a estabiliza\u00e7\u00e3o ou melhoria.<\/div>\n<\/div>\n<div class=\"expand-button-wrapper\"><button class=\"text-accent expand-button\">+<\/button><\/div>\n<\/div>\n<div class=\"faq-item faq-answer-hidden\">\n<div class=\"question-block\">\n<div class=\"faq-question\">\n<p class=\" text-black h5-title\">5. Como \u00e9 diagnosticada a cardiomiopatia restritiva?<\/p>\n<\/div>\n<div class=\"faq-answer text-main-text-color main-text-medium\">S\u00e3o utilizados ecocardiografia, TC\/RM do cora\u00e7\u00e3o, ECG, biomarcadores (NT-proBNP, troponinas), bi\u00f3psia do mioc\u00e1rdio, cintilografia e testes laboratoriais para detetar amiloidose e outras causas.<\/div>\n<\/div>\n<div class=\"expand-button-wrapper\"><button class=\"text-accent expand-button\">+<\/button><\/div>\n<\/div>\n<div class=\"faq-item faq-answer-hidden\">\n<div class=\"question-block\">\n<div class=\"faq-question\">\n<p class=\" text-black h5-title\">6. Quais s\u00e3o as doen\u00e7as que mais frequentemente levam \u00e0 CMR?<\/p>\n<\/div>\n<div class=\"faq-answer text-main-text-color main-text-medium\">Amiloidose (ATTR e AL), sarcoidose, hemocromatose, doen\u00e7as sist\u00e9micas do tecido conjuntivo, endomiocardite eosinof\u00edlica, les\u00e3o por radia\u00e7\u00e3o.<\/div>\n<\/div>\n<div class=\"expand-button-wrapper\"><button class=\"text-accent expand-button\">+<\/button><\/div>\n<\/div>\n<div class=\"faq-item faq-answer-hidden\">\n<div class=\"question-block\">\n<div class=\"faq-question\">\n<p class=\" text-black h5-title\">7. Qual \u00e9 o tratamento para a cardiomiopatia restritiva?<\/p>\n<\/div>\n<div class=\"faq-answer text-main-text-color main-text-medium\">Tratamento da causa (por exemplo, quimioterapia para amiloidose AL), controlo dos sintomas (diur\u00e9ticos, antiarr\u00edtmicos) e, em casos de insufici\u00eancia card\u00edaca grave, transplante card\u00edaco.<\/div>\n<\/div>\n<div class=\"expand-button-wrapper\"><button class=\"text-accent expand-button\">+<\/button><\/div>\n<\/div>\n<div class=\"faq-item faq-answer-hidden\">\n<div class=\"question-block\">\n<div class=\"faq-question\">\n<p class=\" text-black h5-title\">8. Qual \u00e9 o progn\u00f3stico para a cardiomiopatia restritiva?<\/p>\n<\/div>\n<div class=\"faq-answer text-main-text-color main-text-medium\">O progn\u00f3stico depende da etiologia. A amiloidose AL est\u00e1 associada a um progn\u00f3stico desfavor\u00e1vel, enquanto que na ATTR pode-se observar um curso mais est\u00e1vel com terapia direcionada.<\/div>\n<\/div>\n<div class=\"expand-button-wrapper\"><button class=\"text-accent expand-button\">+<\/button><\/div>\n<\/div>\n<div class=\"faq-item faq-answer-hidden\">\n<div class=\"question-block\">\n<div class=\"faq-question\">\n<p class=\" text-black h5-title\">9. \u00c9 poss\u00edvel praticar desporto com o diagn\u00f3stico de CMR?<\/p>\n<\/div>\n<div class=\"faq-answer text-main-text-color main-text-medium\">A atividade f\u00edsica deve ser limitada. Apenas exerc\u00edcios f\u00edsicos ligeiros sob supervis\u00e3o m\u00e9dica s\u00e3o permitidos.<\/div>\n<\/div>\n<div class=\"expand-button-wrapper\"><button class=\"text-accent expand-button\">+<\/button><\/div>\n<\/div>\n<div class=\"faq-item faq-answer-hidden\">\n<div class=\"question-block\">\n<div class=\"faq-question\">\n<p class=\" text-black h5-title\">10. Quando \u00e9 indicado o transplante card\u00edaco em casos de CMR?<\/p>\n<\/div>\n<div class=\"faq-answer text-main-text-color main-text-medium\">Em insufici\u00eancia card\u00edaca terminal resistente \u00e0 terapia, sem les\u00f5es extracard\u00edacas e na aus\u00eancia de contraindica\u00e7\u00f5es. Isto \u00e9 especialmente relevante quando tratamentos espec\u00edficos (por exemplo, amiloidose AL) s\u00e3o ineficazes.<\/div>\n<\/div>\n<div class=\"expand-button-wrapper\"><button class=\"text-accent expand-button\">+<\/button><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"sources-list-block sources-list-hidden\" id=\"referencias\">\n<div class=\"sources-list-content\">\n<div class=\"sources-list-title\">\n<p class=\"small-text-bold text-black sources-list-title-text\">Refer\u00eancias<\/p>\n<div class=\"sources-expand-button-wrapper-mobile\">\n<div class=\"sources-expand-button\"><svg width=\"32\" height=\"32\" viewbox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M8 12L16 20L24 12\" stroke=\"#8C9AAB\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/svg><\/div>\n<\/div>\n<\/div>\n<div class=\"sources-list-items\">\n<div class=\"source-item\">\n<p class=\"main-text-semibold text-black\">1.<\/p>\n<div class=\"source-item-content\">\n<p class=\"main-text-semibold text-black\"><cite>Cat\u00e1logo VOKA (VOKA Catalog). [Recurso eletr\u00f4nico]<\/cite><\/p>\n<p><span class=\"small-text-medium text-grey\">https:\/\/catalog.voka.io\/<\/span><\/div>\n<\/div>\n<div class=\"source-item\">\n<p class=\"main-text-semibold text-black\">2.<\/p>\n<div class=\"source-item-content\">\n<p class=\"main-text-semibold text-black\"><cite>Rapezzi C, Aimo A, Barison A, et al. Restrictive cardiomyopathy: definition and diagnosis. Eur Heart J. 2022 Dec 1;43(45):4679-4693. doi: 10.1093\/eurheartj\/ehac543.<\/cite><\/p>\n<\/div>\n<\/div>\n<div class=\"source-item\">\n<p class=\"main-text-semibold text-black\">3.<\/p>\n<div class=\"source-item-content\">\n<p class=\"main-text-semibold text-black\"><cite>Arbelo E, Protonotarios A, Gimeno JR, et al. 2023 ESC Guidelines for the management of cardiomyopathies. Eur Heart J. 2023 Oct 1;44(37):3503-3626. doi: 10.1093\/eurheartj\/ehad194.<\/cite><\/p>\n<\/div>\n<\/div>\n<div class=\"source-item\">\n<p class=\"main-text-semibold text-black\">4.<\/p>\n<div class=\"source-item-content\">\n<p class=\"main-text-semibold text-black\"><cite>Muchtar E, Blauwet LA, Gertz MA. Restrictive Cardiomyopathy: Genetics, Pathogenesis, Clinical Manifestations, Diagnosis, and Therapy. Circ Res. 2017 Set 15;121(7):819-837. doi: 10.1161\/CIRCRESAHA.117.310982.<\/cite><\/p>\n<\/div>\n<\/div>\n<div class=\"source-item\">\n<p class=\"main-text-semibold text-black\">5.<\/p>\n<div class=\"source-item-content\">\n<p class=\"main-text-semibold text-black\"><cite>Vio R, Angelini A, Basso C, et al. Hypertrophic Cardiomyopathy and Primary Restrictive Cardiomyopathy: Similarities, Differences and Phenocopies. J Clin Med. 2021 May 1;10(9):1954. doi: 10.3390\/jcm10091954.<\/cite><\/p>\n<\/div>\n<\/div>\n<div class=\"source-item\">\n<p class=\"main-text-semibold text-black\">6.<\/p>\n<div class=\"source-item-content\">\n<p class=\"main-text-semibold text-black\"><cite>Garcia MJ. Constrictive Pericarditis Versus Restrictive Cardiomyopathy? J Am Coll Cardiol. 2016 May 3;67(17):2061-76. doi: 10.1016\/j.jacc.2016.01.076.<\/cite><\/p>\n<\/div>\n<\/div>\n<div class=\"source-item\">\n<p class=\"main-text-semibold text-black\">7.<\/p>\n<div class=\"source-item-content\">\n<p class=\"main-text-semibold text-black\"><cite>Arbel\u00e1ez-Cort\u00e9s \u00c1, Quintero-Gonz\u00e1lez DC, Cuesta-Astroz Y, et al. Restrictive cardiomyopathy in a patient with systemic sclerosis and Fabry disease: a case-based review. Rheumatol Int. 2020 Mar;40(3):489-497. doi: 10.1007\/s00296-019-04453-y.<\/cite><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"sources-expand-button-wrapper\">\n<div class=\"sources-expand-button\"><svg width=\"32\" height=\"32\" viewbox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M8 12L16 20L24 12\" stroke=\"#8C9AAB\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/svg><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A cardiomiopatia restritiva (CMR) \u00e9 uma forma rara de cardiomiopatias prim\u00e1rias ou secund\u00e1rias, caracterizada por comprometimento do enchimento diast\u00f3lico do ventr\u00edculo esquerdo e\/ou direito com fun\u00e7\u00e3o sist\u00f3lica e espessura da parede normais ou quase normais. Ao mesmo tempo, o aumento da rigidez mioc\u00e1rdica leva ao aumento da press\u00e3o diast\u00f3lica e insufici\u00eancia card\u00edaca congestiva. Esta condi\u00e7\u00e3o [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"template":"","diseases_category":[293],"class_list":["post-2284","diseases_post","type-diseases_post","status-publish","hentry","diseases_category-cardiologia"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v26.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Cardiomiopatia restritiva (CMR): causas, sintomas, diagn\u00f3stico e tratamento<\/title>\n<meta name=\"description\" content=\"An\u00e1lise detalhada da cardiomiopatia restritiva (CMR). Este artigo aborda a etiologia, patog\u00e9nese, crit\u00e9rios de diagn\u00f3stico (ECG, ecocardiografia), estrat\u00e9gias de tratamento medicamentoso e progn\u00f3stico.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wiki.dev.voka.io\/pt\/doencas\/cardiologia\/cardiomiopatia-restritiva\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cardiomiopatia restritiva: etiologia, patog\u00e9nese, sintomas, diagn\u00f3stico, m\u00e9todos de tratamento\" \/>\n<meta property=\"og:description\" content=\"An\u00e1lise detalhada da cardiomiopatia restritiva (CMR). 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