cardiomyopathies/hypoxia

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Effect of hypoxia and diet on spontaneous turkey cardiomyopathy (round-heart disease).

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The purpose of this study was to examine the effect of hypoxia-induced hypoxemia and rate of growth on spontaneous dilatory cardiomyopathy in turkey poults. Turkey poults grown in a hypobaric chamber at an atmospheric pressure of 592 mmHg (calculated partial pressure of oxygen: 124 mmHg; calculated

Genetic variations in hypoxia response genes influence hypertrophic cardiomyopathy phenotype.

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BACKGROUND Risk factors for diastolic dysfunction in hypertrophic cardiomyopathy (HCM) are poorly understood. We investigated the association of variants in hypoxia-response genes with phenotype severity in pediatric HCM. METHODS A total of 80 unrelated patients <21 y and 14 related members from

Contribution of hypoxia to the development of cardiomyopathy in hamsters.

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OBJECTIVE It has been hypothesized that microvascular spasms cause cardiomyopathy. To elucidate the contribution of hypoxia to the development of cardiomyopathy, the newly-developed hypoxia tracer, Tc-99m nitroimidazole, was applied to detect myocardial hypoxia in a hamster model. METHODS Tc-99m

Metallothionein as a compensatory component prevents intermittent hypoxia-induced cardiomyopathy in mice.

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Obstructive sleep apnea (OSA) causes chronic intermittent hypoxia (IH) to induce cardiovascular disease, which may be related to oxidative damage. Metallothionein (MT) has been extensively proved to be an endogenous and highly inducible antioxidant protein expressed in the heart. Therefore, we

Loss of hypoxia-inducible factor prolyl hydroxylase activity in cardiomyocytes phenocopies ischemic cardiomyopathy.

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BACKGROUND Ischemic cardiomyopathy is the major cause of heart failure and a significant cause of morbidity and mortality. The degree of left ventricular dysfunction in this setting is often out of proportion to the amount of overtly infarcted tissue, and how decreased delivery of oxygen and

Intermittent Hypoxia Triggers Early Cardiac Remodeling and Contractile Dysfunction in the Time-Course of Ischemic Cardiomyopathy in Rats

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BACKGROUND Sleep-disordered breathing is associated with a poor prognosis (mortality) in patients with ischemic cardiomyopathy. The understanding of mechanisms linking intermittent hypoxia (IH), the key feature of sleep-disordered breathing, to ischemic cardiomyopathy progression is crucial for

Combination of Broccoli Sprout Extract and Zinc Provides Better Protection against Intermittent Hypoxia-Induced Cardiomyopathy Than Monotherapy in Mice.

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Nuclear factor-E2-related factor 2 (Nrf2) and metallothionein have each been reported to protect against chronic intermittent hypoxia- (IH-) induced cardiomyopathy. Sulforaphane-rich broccoli sprout extract (BSE) and zinc can effectively induce Nrf2 and metallothionein, respectively, to protect

Intermittent hypoxia-induced cardiomyopathy and its prevention by Nrf2 and metallothionein.

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The mechanism for intermittent hypoxia (IH)-induced cardiomyopathy remains obscure. We reported the prevention of acute and chronic IH-induced cardiac damage by selective cardiac overexpression of metallothionein (MT). Herein we defined that MT-mediated protection from IH-cardiomyopathy is via

Nrf2 expression and function, but not MT expression, is indispensable for sulforaphane-mediated protection against intermittent hypoxia-induced cardiomyopathy in mice.

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We reported previously that nuclear factor erythroid 2-related factor 2 (Nrf2) and metallothionein (MT) play critical roles in preventing intermittent hypoxia (IH)-induced cardiomyopathy. In addition, positive feedback regulation between Nrf2 and MT is required for the efficient compensative

The Hypoxia-Inducible Factor Pathway in Adipocytes: The Role of HIF-2 in Adipose Inflammation and Hypertrophic Cardiomyopathy.

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Under obese conditions, adipose tissue can become oxygen-deficient or hypoxic. Extensive work has been done using various diet-induced obesity models to demonstrate an important role of hypoxia-induced signaling in adipose tissue and its impact on adipose functions related to adipogenesis, insulin

Association between myocardial hypoxia and fibrosis in hypertrophic cardiomyopathy: analysis by T2* BOLD and T1 mapping MRI.

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We assessed whether an association exists between myocardial oxygenation and myocardial fibrosis in patients with hypertrophic cardiomyopathy (HCM), using blood-oxygen-level-dependent (BOLD) T2* cardiac magnetic resonance imaging (T2*-CMR) and T1 mapping.T1

Hypoxia induces dilated cardiomyopathy in the chick embryo: mechanism, intervention, and long-term consequences.

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BACKGROUND Intrauterine growth restriction is associated with an increased future risk for developing cardiovascular diseases. Hypoxia in utero is a common clinical cause of fetal growth restriction. We have previously shown that chronic hypoxia alters cardiovascular development in chick embryos.

Influenza Induced Cardiomyopathy: An Unusual Cause of Hypoxemia.

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Influenza has considerable burden on public health funds. The complications of influenza can be devastating. We present a case of a 42-year-old woman with history of asthma who presented to the emergency room in winter with shortness of breath and general malaise and was found to be in hypoxemic

Hypoxic cardiomyopathy: acute myocardial dysfunction after severe hypoxia.

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Five cases of acute transient myocardial dysfunction in previously well people after severe hypoxic episode are described. In all cases the hypoxic episode was associated with drug overdose and its complications. Pulmonary infiltrates on chest X-ray consistent with pulmonary edema developed in four

Myocardial Hypoxia in Dilated Cardiomyopathy: Is it Just a Matter of Supply and Demand?

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