Peso dos ventrículos cardíacos determinado em necropsia de indivíduos saudáveis mortos por causas externas

Rodrigues, Sérgio Lamêgo; Pimentel, Enildo Broetto; Mill, José Geraldo

doi:10.1590/s0066-782x2007001700001

Cited by 10 publications

(3 citation statements)

References 32 publications

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“…The study did not include measurements of the atrial and right ventricle mass as this was not possible due the thin walls of these structures. However, our previous studies indicated no changes in pro-atrial-natriuretic factor during maximum apnea in competitive BHD indicating no stretching of atrial muscle, and as the right ventricle is much less muscular than the left (Rodrigues et al, 2007), we assume that changes in these chambers may be of lesser importance (Kjeld et al, 2015;Kjeld et al, 2021c). Measurements were all done during dry apneas after glossopharyngeal insufflation, which limits venous return (Eichinger et al, 2010).…”

Section: Limitationsmentioning

confidence: 98%

Hemoglobin concentration and blood shift during dry static apnea in elite breath hold divers

Kjeld,

Krag,

Brenøe

et al. 2024

Front. Physiol.

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IntroductionElite breath-hold divers (BHD) enduring apneas of more than 5 min are characterized by tolerance to arterial blood oxygen levels of 4.3 kPa and low oxygen-consumption in their hearts and skeletal muscles, similar to adult seals. Adult seals possess an adaptive higher hemoglobin-concentration and Bohr effect than pups, and when sedated, adult seals demonstrate a blood shift from the spleen towards the brain, lungs, and heart during apnea. We hypothesized these observations to be similar in human BHD. Therefore, we measured hemoglobin- and 2,3-biphosphoglycerate-concentrations in BHD (n = 11) and matched controls (n = 11) at rest, while myocardial mass, spleen and lower extremity volumes were assessed at rest and during apnea in BHD.Methods and resultsAfter 4 min of apnea, left ventricular myocardial mass (LVMM) determined by 15O-H2O-PET/CT (n = 6) and cardiac MRI (n = 6), was unaltered compared to rest. During maximum apnea (∼6 min), lower extremity volume assessed by DXA-scan revealed a ∼268 mL decrease, and spleen volume, assessed by ultrasonography, decreased ∼102 mL. Compared to age, BMI and VO2max matched controls (n = 11), BHD had similar spleen sizes and 2,3- biphosphoglycerate-concentrations, but higher total hemoglobin-concentrations.ConclusionOur results indicate: 1) Apnea training in BHD may increase hemoglobin concentration as an oxygen conserving adaptation similar to adult diving mammals. 2) The blood shift during dry apnea in BHD is 162% more from the lower extremities than from the spleen. 3) In contrast to the previous theory of the blood shift demonstrated in sedated adult seals, blood shift is not towards the heart during dry apnea in humans.

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Section: Limitationsmentioning

confidence: 98%

Hemoglobin concentration and blood shift during dry static apnea in elite breath hold divers

Kjeld,

Krag,

Brenøe

et al. 2024

Front. Physiol.

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“…However, distortions are more likely to occur in such situations since, depending on the time elapsed and clinical condition of the patient before death, the bias can be relevant. In our midst, Rodrigues et al 29 studied hearts from autopsies of healthy individuals who died of accidental causes and suggested the presence of LVH when the left ventricular mass is higher than 218g or 128 g/m in men and 148 g or 88 g/m in women.…”

Section: Original Articlementioning

confidence: 99%

O eletrocardiograma no diagnóstico da hipertrofia ventricular de pacientes com doença renal crônica

Costa¹,

Rivera²,

Vasconcelos³

et al. 2009

Arq. Bras. Cardiol.

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“…De Marco et al relatam resultados de monitorização residencial de pressão arterial, sem correlação entre a PAD e o IMVE. A PAS e a PP correlacionam-se positivamente com o IMVE (33) . Machado et al caracterizaram cuidadores de candidatos a transplante do coração e identificaram um familiar (cônjuge), do sexo feminino, com idade média de 44,3 anos, renda própria, classificados, na maioria, como "bons" ou "regulares", não havendo correlação com escolaridade, atividade profissional e renda (34) .…”

Section: Cardiologiaunclassified

Artigos publicados em periódicos brasileiros de interesse para a medicina do exercício e do esporte: uma revisão

Hernandez¹

2009

Rev Bras Med Esporte

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RESUMoEsta nova série de artigos tem por objetivo levar aos leitores nacionais e internacionais algumas das mais importantes contribuições provenientes da literatura médica brasileira recente. Embora possa parecer que não tenham relação direta com a Medicina do Exercício e do Esporte, são trabalhos que podem oferecer suporte a muitas linhas de pesquisa nessa área. Os artigos originais mais relevantes são selecionados por experientes editores, a quem solicitamos que escolham palavras-chave para que sejam destacadas para chamar a atenção do leitor. Para facilitar a leitura, os artigos são organizados por área de interesse. Para aproveitar ao máximo o limitado espaço editorial, não são incluídos os nomes dos autores dos artigos. Entretanto, a referência completa é oferecida ao final do artigo. O resultado final traz o que há de melhor do artigo, seguido de uma sintética interpretação pessoal. Endereçado ao médico ocupado, esperamos que esta inciativa possa contribuir para o sucesso da translação do conhecimento da evidência científica para a prática clínica. Palavras-chave: medicina esportiva, cardiologia, ortopedia, nutrição. aBStRaCtThis brand-new series of articles aims at delivering to national and international readers some of the cutting-edge contributions from the Brazilian medical literature. Some of them may not be directly related to the area, but they can be the grounding for scientific research in the field of Sports and Exercise Medicine. Recently, papers published in the main Brazilian medical journals are carefully selected and analyzed by skilled medical editors. In addition, we asked editors to choose keywords to be highlighted in order to call the reader' s attention. Articles are organized by area of interest to facilitate reading. To get the most of the limited available editorial space we did not include the names of the authors of the related articles in the text itself, but a complete reference guide is provided at the end of the article. The result carries the best from the original paper accompanied by a personal interpretation. Directed to the busy medical doctor, we hope that this initiative may contribute to the successful translation of knowledge from scientific evidence to clinical practice.

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Peso dos ventrículos cardíacos determinado em necropsia de indivíduos saudáveis mortos por causas externas

Abstract: SummaryObjective: To establish cardiac ventricular weights recorded during the autopsy of healthy individuals who died of external causes, aiming at determining normality patterns in our population. Methods

Cited by 10 publications

References 32 publications

Hemoglobin concentration and blood shift during dry static apnea in elite breath hold divers

Hemoglobin concentration and blood shift during dry static apnea in elite breath hold divers

O eletrocardiograma no diagnóstico da hipertrofia ventricular de pacientes com doença renal crônica

Artigos publicados em periódicos brasileiros de interesse para a medicina do exercício e do esporte: uma revisão

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