Subclinical Hyperthyroidism and the Cardiovascular Disease

AbstractThyroid hormone excess has complex metabolic effects, particularly on the cardiovascular system. Treatment of these conditions is universally suggested by international guidelines. Subclinical hyperthyroidism, defined by reduced or suppressed TSH levels in the presence of normal free thyroxine and free triiodothyronine values, is common in the general population and progressively increases with aging, being as high as 15.4% in subjects more than 75 years old and more frequent in subjects with nodular goiter. Subclinical hyperthyroidism is often asymptomatic and the diagnosis is incidentally made during screening exams. However, this form of thyroid disorder has gained attention in the last years for its association with cardiovascular disease, in particular with atrial fibrillation. Less clear are the effects of subclinical hyperthyroidism on blood pressure, stroke, or heart failure. The decision to treat subclinical hyperthyroidism is made on the clinical judge, particularly in elderly patients and/or in the presence of comorbidities.

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Association of Lipoprotein (a) variants with risk of cardiovascular disease: a Mendelian randomization study

Lipids in Health and Disease ◽

10.1186/s12944-021-01482-0 ◽

2021 ◽

Vol 20 (1) ◽

Author(s):

Juan Xia ◽

Chunyue Guo ◽

Kuo Liu ◽

Yunyi Xie ◽

Han Cao ◽

...

Keyword(s):

Heart Failure ◽

Atrial Fibrillation ◽

Cardiovascular Disease ◽

Chinese Population ◽

Left Ventricular Mass Index ◽

Mendelian Randomization ◽

Left Ventricular ◽

Han Chinese ◽

Han Chinese Population ◽

Internal Dimension

Abstract Background There is a well-documented empirical relationship between lipoprotein (a) [Lp(a)] and cardiovascular disease (CVD); however, causal evidence, especially from the Chinese population, is lacking. Therefore, this study aims to estimate the causal association between variants in genes affecting Lp(a) concentrations and CVD in people of Han Chinese ethnicity. Methods Two-sample Mendelian randomization analysis was used to assess the causal effect of Lp(a) concentrations on the risk of CVD. Summary statistics for Lp(a) variants were obtained from 1256 individuals in the Cohort Study on Chronic Disease of Communities Natural Population in Beijing, Tianjin and Hebei. Data on associations between single-nucleotide polymorphisms (SNPs) and CVD were obtained from recently published genome-wide association studies. Results Thirteen SNPs associated with Lp(a) levels in the Han Chinese population were used as instrumental variables. Genetically elevated Lp(a) was inversely associated with the risk of atrial fibrillation [odds ratio (OR), 0.94; 95% confidence interval (95%CI), 0.901–0.987; P = 0.012)], the risk of arrhythmia (OR, 0.96; 95%CI, 0.941–0.990; P = 0.005), the left ventricular mass index (OR, 0.97; 95%CI, 0.949–1.000; P = 0.048), and the left ventricular internal dimension in diastole (OR, 0.97; 95%CI, 0.950–0.997; P = 0.028) according to the inverse-variance weighted method. No significant association was observed for congestive heart failure (OR, 0.99; 95% CI, 0.950–1.038; P = 0.766), ischemic stroke (OR, 1.01; 95%CI, 0.981–1.046; P = 0.422), and left ventricular internal dimension in systole (OR, 0.98; 95%CI, 0.960–1.009; P = 0.214). Conclusions This study provided evidence that genetically elevated Lp(a) was inversely associated with atrial fibrillation, arrhythmia, the left ventricular mass index and the left ventricular internal dimension in diastole, but not with congestive heart failure, ischemic stroke, and the left ventricular internal dimension in systole in the Han Chinese population. Further research is needed to identify the mechanism underlying these results and determine whether genetically elevated Lp(a) increases the risk of coronary heart disease or other CVD subtypes.

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Cardiovascular risk after hospitalisation for unexplained syncope and orthostatic hypotension

Heart ◽

10.1136/heartjnl-2017-311857 ◽

2017 ◽

Vol 104 (6) ◽

pp. 487-493 ◽

Cited By ~ 14

Author(s):

Ekrem Yasa ◽

Fabrizio Ricci ◽

Martin Magnusson ◽

Richard Sutton ◽

Sabina Gallina ◽

...

Keyword(s):

Heart Failure ◽

Atrial Fibrillation ◽

Cardiovascular Disease ◽

Orthostatic Hypotension ◽

Cardiovascular Events ◽

Hospital Admissions ◽

Cox Regression ◽

All Cause Mortality ◽

Unexplained Syncope ◽

The Impact

ObjectiveTo investigate the relationship of hospital admissions due to unexplained syncope and orthostatic hypotension (OH) with subsequent cardiovascular events and mortality.MethodsWe analysed a population-based prospective cohort of 30 528 middle-aged individuals (age 58±8 years; males, 40%). Adjusted Cox regression models were applied to assess the impact of unexplained syncope/OH hospitalisations on cardiovascular events and mortality, excluding subjects with prevalent cardiovascular disease.ResultsAfter a median follow-up of 15±4 years, 524 (1.7%) and 504 (1.7%) participants were hospitalised for syncope or OH, respectively, yielding 1.2 hospital admissions per 1000 person-years for each diagnosis. Syncope hospitalisations increased with age (HR, per 1 year: 1.07, 95% CI 1.05 to 1.09), higher systolic blood pressure (HR, per 10 mm Hg: 1.06, 95% CI 1.01 to 1.12), antihypertensive treatment (HR: 1.26, 95% CI 1.00 to 1.59), use of diuretics (HR: 1.77, 95% CI 1.31 to 2.38) and prevalent cardiovascular disease (HR: 1.59, 95% CI 1.14 to 2.23), whereas OH hospitalisations increased with age (HR: 1.11, 95% CI 1.08 to 1.12) and prevalent diabetes (HR: 1.82, 95% CI 1.23 to 2.70). After exclusion of 1399 patients with prevalent cardiovascular disease, a total of 473/464 patients were hospitalised for unexplained syncope/OH before any cardiovascular event. Hospitalisation for unexplained syncope predicted coronary events (HR: 1.85, 95% CI 1.49 to 2.30), heart failure (HR: 2.24, 95% CI 1.65 to 3.04), atrial fibrillation (HR: 1.84, 95% CI 1.50 to 2.26), aortic valve stenosis (HR: 2.06, 95% CI 1.28 to 3.32), all-cause mortality (HR: 1.22, 95% CI 1.09 to 1.37) and cardiovascular death (HR: 1.72, 95% CI 1.23 to 2.42). OH-hospitalisation predicted stroke (HR: 1.66, 95% CI 1.24 to 2.23), heart failure (HR: 1.78, 95% CI 1.21 to 2.62), atrial fibrillation (HR: 1.89, 95% CI 1.48 to 2.41) and all-cause mortality (HR: 1.14, 95% CI 1.01 to 1.30).ConclusionsPatients discharged with the diagnosis of unexplained syncope or OH show higher incidence of cardiovascular disease and mortality with only partial overlap between these two conditions.

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Prevention of atrial fibrillation – non-modifiable and modifiable risk factors for AF

In a good rythm ◽

10.5604/01.3001.0014.2845 ◽

2020 ◽

Vol 2 (55) ◽

pp. 14-19

Author(s):

Agnieszka Wojdyła-Hordyńska ◽

Grzegorz Hordyński

Keyword(s):

Risk Factors ◽

Heart Failure ◽

Atrial Fibrillation ◽

Cardiovascular Disease ◽

Cardiovascular Diseases ◽

Sudden Cardiac Death ◽

Cardiac Death ◽

Combined Treatment ◽

Lifestyle Changes ◽

Modifiable Risk Factors

Atrial fibrillation is one of the most common arrhythmias, with a significant increase in incidence in recent years. AF is a major cause of stroke, heart failure, sudden cardiac death, and cardiovascular disease. Timely intervention and modification of risk factors increase chance to stop the disease. Aggressive, multilevel prevention tactics are a component of combined treatment, including – in addition to lifestyle changes, anticoagulant therapy, pharmacotherapy and invasive anti-arrhythmic treatment – prevention of cardiovascular diseases, hypertension, ischemia, valvular disease and heart failure.

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Association of Blood Pressure Classification Using the 2017 American College of Cardiology/American Heart Association Blood Pressure Guideline with Risk of Heart Failure and Atrial Fibrillation

Circulation ◽

10.1161/circulationaha.120.052624 ◽

2021 ◽

Author(s):

Hidehiro Kaneko ◽

Yuichiro Yano ◽

Hidetaka Itoh ◽

Kojiro Morita ◽

Hiroyuki Kiriyama ◽

...

Keyword(s):

Heart Failure ◽

Atrial Fibrillation ◽

Blood Pressure ◽

American Heart Association ◽

American Heart ◽

Heart Association ◽

Cox Proportional Hazards ◽

Health Claims ◽

Claims Database ◽

Stage 1

Background: Heart failure (HF) and atrial fibrillation (AF) are growing in prevalence worldwide. Few studies have assessed to what extent stage 1 hypertension in the 2017 American College of Cardiology (ACC)/American Heart Association (AHA) blood pressure (BP) guidelines is associated with incident HF and AF. Methods: Analyses were conducted using a nationwide health claims database collected in the JMDC Claims Database between 2005 and 2018 (n=2,196,437; mean age, 44.0±10.9 years; 584% men). No participants were taking antihypertensive medication or had a known history of cardiovascular disease. Each participant was categorized as having normal BP (systolic BP [SBP]<120 mm Hg and diastolic BP [DBP]<80 mm Hg; n=1,155,885); elevated BP (SBP 120-129 mm Hg and DBP<80 mm Hg; n=337,390); stage 1 hypertension (SBP 130-139 mm Hg or DBP 80-89 mm Hg; n=459,820); or stage 2 hypertension (SBP≥140 mm Hg or DBP≥90 mm Hg; n=243,342). Using Cox proportional hazards models, we identified associations between BP groups and HF/AF events. We also calculated the population attributable fractions (PAFs) to estimate the proportion of HF and AF events that would be preventable if participants with stage 1 and stage 2 hypertension were to have normal BP. Results: Over a mean follow-up of 1,112±854 days, 28,056 incident HF and 7,774 incident AF events occurred. After multivariable adjustment, hazard ratios for HF and AF events were 1.10 (95% Confidence interval [CI], 1.05-1.15) and 1.07 (95% CI, 0.99-1.17), respectively, for elevated BP; 1.30 (95% CI, 1.26-1.35) and 1.21 (95% CI, 1.13-1.29), respectively, for stage 1 hypertension; and 2.05 (95% CI, 1.97-2.13) and 1.52 (95% CI, 1.41-1.64), respectively, for stage 2 hypertension vs normal BP. PAFs for HF associated with stage 1 and stage 2 hypertension were 23.2% (95% CI, 20.3%-26.0%) and 51.2% (95% CI, 49.2%-53.1%), respectively. The PAFs for AF associated with stage 1 and stage 2 hypertension were 17.4% (95% CI, 11.5%-22.9%) and 34.3% (95% CI, 29.1%-39.2%), respectively. Conclusions: Both stage 1 and stage 2 hypertension were associated with a greater incidence of HF and AF in the general population. The ACC/AHA BP classification system may help identify adults at higher risk for HF and AF events.

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Relationship Between a Plant‐Based Dietary Portfolio and Risk of Cardiovascular Disease: Findings From the Women's Health Initiative Prospective Cohort Study

Journal of the American Heart Association ◽

10.1161/jaha.121.021515 ◽

2021 ◽

Author(s):

Andrea J. Glenn ◽

Kenneth Lo ◽

David J. A. Jenkins ◽

Beatrice A. Boucher ◽

Anthony J. Hanley ◽

...

Keyword(s):

Heart Failure ◽

Atrial Fibrillation ◽

Cardiovascular Disease ◽

Coronary Heart Disease ◽

Heart Disease ◽

Postmenopausal Women ◽

Prospective Cohort ◽

Health Initiative ◽

Dietary Portfolio ◽

Diet Score

Background The plant‐based Dietary Portfolio combines established cholesterol‐lowering foods (plant protein, nuts, viscous fiber, and phytosterols), plus monounsaturated fat, and has been shown to improve low‐density lipoprotein cholesterol and other cardiovascular disease (CVD) risk factors. No studies have evaluated the relation of the Dietary Portfolio with incident CVD events. Methods and Results We followed 123 330 postmenopausal women initially free of CVD in the Women's Health Initiative from 1993 through 2017. We used Cox proportional‐hazard models to estimate adjusted hazard ratios (HRs) and 95% CI of the association of adherence to a Portfolio Diet score with CVD outcomes. Primary outcomes were total CVD, coronary heart disease, and stroke. Secondary outcomes were heart failure and atrial fibrillation. Over a mean follow‐up of 15.3 years, 13 365 total CVD, 5640 coronary heart disease, 4440 strokes, 1907 heart failure, and 929 atrial fibrillation events occurred. After multiple adjustments, adherence to the Portfolio Diet score was associated with lower risk of total CVD (HR, 0.89; 95% CI, 0.83–0.94), coronary heart disease (HR, 0.86; 95% CI, 0.78–0.95), and heart failure (HR, 0.83; 95% CI, 0.71–0.99), comparing the highest to lowest quartile of adherence. There was no association with stroke (HR, 0.97; 95% CI, 0.87–1.08) or atrial fibrillation (HR, 1.10; 95% CI, 0.87–1.38). These results remained statistically significant after several sensitivity analyses. Conclusions In this prospective cohort of postmenopausal women in the United States, higher adherence to the Portfolio Diet was associated with a reduction in incident cardiovascular and coronary events, as well as heart failure. These findings warrant further investigation in other populations.

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Subclinical Hyperthyroidism: Diagnostic Criteria and Principles of Treatment

Family Medicine ◽

10.30841/2307-5112.5.2016.248750 ◽

2016 ◽

pp. 75-79

Author(s):

Vita Galitskaya

Keyword(s):

Hormone Receptors ◽

Color Doppler ◽

Specific Treatment ◽

Nodular Goiter ◽

Thyroid Stimulating Hormone ◽

Free Thyroxine ◽

Subclinical Hyperthyroidism ◽

Mineral Density ◽

Free Triiodothyronine ◽

Stimulating Hormone

This article presents the European Thyroid Association guidelines for diagnosis and treatment of subclinical hyperthyroidism, 2015. Determination of thyroid1stimulating hormone levels can help to diagnose a variety of pathological conditions: hypertension, cardiac fibrillation, atrial fibrillation, mineral density reduction in bones, menstrual irregularities, infertility, which require specific treatment after detection of hormonal status disorders (subclinical, overt), taking into account the patient’s age. Diagnosis of endogenous subclinical hyperthyroidism is based solely on the results of laboratory tests, not clinical criteria. Endogenous subclinical hyperthyroidism is defined by the presence of sub-normal levels of thyroid-stimulating hormone with normal levels of free thyroxine, total triiodothyronine, and/or free triiodothyronine. There are two categories of endogenous subclinical hyperthyroidism: stage 1 – the level of thyroid-stimulating hormone is 0,1–0,39 mIU/l; stage 2 – the level of thyroid-stimulating hormone is <0.1 mIU/l. The levels of free thyroxine and free triiodothyronine, as a rule, are medium-high value at a subclinical level of thyroid hormone and can help differentiate between endogenous subclinical hyperthyroidism from overt hyperthyroidism. It is recommended to study the thyroid-stimulating hormone level as the first test for the diagnosis of subclinical hyperthyroidism. In identifying low levels of thyroid-stimulating hormone it is necessary to investigate the level of free thyroxine, free or bound triiodothyronine. Patients with primary sub-normal levels of thyroid-stimulating hormone with concentration of thyroid hormones in the upper limit or in normal range should be evaluated within 2-3 months. It is recommended to perform scintigraphy and possible 24-hour test the absorption of radioactive iodine if in patient with 2nd degree endogenous subclinical hyperthyroidism there is nodular goiter to determine treatment strategy. Ultrasonography with color Doppler can be informative for patients with endogenous subclinical hyperthyroidism and nodular goiter. Determining the level of antibodies to thyroid-stimulating hormone receptors can confirm the etiology of autoimmune-induced hyperthyroidism.

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Abstract 14: Cardiac Biomarkers are Associated With Findings on Brain MRI in Older Adults: The Atherosclerosis Risk in Communities (ARIC) Study

Circulation ◽

10.1161/circ.141.suppl_1.14 ◽

2020 ◽

Vol 141 (Suppl_1) ◽

Cited By ~ 1

Author(s):

Andreea M Rawlings ◽

Christie M Ballantyne ◽

Rebecca F Gottesman ◽

Ron C Hoogeveen ◽

Timothy M Hughes ◽

...

Keyword(s):

Heart Failure ◽

Atrial Fibrillation ◽

Cardiovascular Disease ◽

Coronary Heart Disease ◽

Heart Disease ◽

Troponin T ◽

Brain Mri ◽

Standard Deviation Increase ◽

Cortical Volume ◽

Galectin 3

Background: Cerebrovascular disease is often the consequence of cardiac disease. Our aim was to examine associations of biomarkers of cardiovascular disease, high sensitivity troponin T (hs-cTnT), NT-proBNP, and galectin-3, with cerebrovascular signs: lacunar infarcts, lobar and subcortical microhemorrhages, cortical infarcts, and white matter hyperintensity (WMH) volume. We also examined total cortical and Alzheimer’s Disease (AD) signature region volumes. Methods: We conducted a cross-sectional analysis of 1748 ARIC participants from the 2011-2013 exam who had biomarker measurements, completed a brain MRI, and did not have a clinical history of stroke. We used linear regression to model brain volumes, modeled as Z scores, and logistic regression for all other outcomes; biomarkers were log transformed. We repeated analyses excluding persons with coronary heart disease, atrial fibrillation, and heart failure. Results: The mean age of participants was 76, 62% were female, and 21% were Black. All biomarkers were associated with total cortical volume. Each standard deviation increase in log hs-cTnT was associated with lower total cortical volume (adjusted beta = -0.08, 95% CI: -0.12, -0.05); results for the other biomarkers were similar (Figure). All biomarkers were associated with lobar microhemorrhages. Hs-cTnT and NT-proBNP were associated with WMH volume, but galectin-3 was not. No biomarker was associated with subcortical microhemorrhages or cortical infarcts. Results were similar in persons without coronary heart disease, atrial fibrillation, or heart failure (conditions associated with cerebral thromboembolism). Conclusions: In persons free of clinical cardiovascular disease, biomarkers of cardiac stretch, strain, and fibrosis were associated cerebral small vessel disease and reduced cortical volume, but not in a specific pattern suggestive of AD pathogenesis. This suggests subclinical vascular insults affect brain structure through mixed pathogenic processes.

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Association of occupational exposures with cardiovascular disease among US Hispanics/Latinos

Heart ◽

10.1136/heartjnl-2018-313463 ◽

2018 ◽

Vol 105 (6) ◽

pp. 439-448 ◽

Cited By ~ 10

Author(s):

Catherine M Bulka ◽

Martha L Daviglus ◽

Victoria W Persky ◽

Ramon A Durazo-Arvizu ◽

James P Lash ◽

...

Keyword(s):

Heart Failure ◽

Atrial Fibrillation ◽

Cardiovascular Disease ◽

Coronary Heart Disease ◽

Heart Disease ◽

Cerebrovascular Disease ◽

Organic Solvents ◽

Occupational Exposures ◽

Latino Workers ◽

Prevalence Ratios

ObjectiveCardiovascular disease (CVD) is a leading cause of mortality and morbidity in the USA. The role of occupational exposures to chemicals in the development of CVD has rarely been studied even though many agents possess cardiotoxic properties. We therefore evaluated associations of self-reported exposures to organic solvents, metals and pesticides in relation to CVD prevalence among diverse Hispanic/Latino workers.MethodsCross-sectional data from 7404 employed individuals, aged 18–74 years, enrolled in the Hispanic Community Health Study/Study of Latinos (HCHS/SOL) were analysed. Participants from four US cities provided questionnaire data and underwent clinical examinations, including ECGs. CVD was defined as the presence of at least one of the following: coronary heart disease, atrial fibrillation, heart failure or cerebrovascular disease. Prevalence ratios reflecting the relationship between each occupational exposure and CVD as well as CVD subtypes were calculated using Poisson regression models.ResultsHispanic/Latino workers reported exposures to organic solvents (6.5%), metals (8.5%) and pesticides (4.7%) at their current jobs. Overall, 6.1% of participants had some form of CVD, with coronary heart disease as the most common (4.3%) followed by cerebrovascular disease (1.0%), heart failure (0.8%) and atrial fibrillation (0.7%). For individuals who reported working with pesticides, the prevalence ratios for any CVD were 2.18 (95% CI 1.34 to 3.55), coronary heart disease 2.20 (95% CI 1.31 to 3.71), cerebrovascular disease 1.38 (95% CI 0.62 3.03), heart failure 0.91 (95% CI 0.23 to 3.54) and atrial fibrillation 5.92 (95% CI 1.89 to 18.61) after adjustment for sociodemographic, acculturation, lifestyle and occupational characteristics. Metal exposures were associated with an almost fourfold (3.78, 95% CI 1.24 to 11.46) greater prevalence of atrial fibrillation. Null associations were observed for organic solvent exposures.ConclusionsOur results suggest that working with metals and pesticides could be risk factors for CVD among Hispanic/Latino workers. Further work is needed to evaluate these relationships prospectively.

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4949Diverging secular trends in cardiovascular disease 21-year incidence in Swedish men born in 1950–1978

European Heart Journal ◽

10.1093/eurheartj/ehz746.0019 ◽

2019 ◽

Vol 40 (Supplement_1) ◽

Author(s):

D Aberg ◽

M Adiels ◽

M Lindgren ◽

J Nyberg ◽

G Kuhn ◽

...

Keyword(s):

Heart Failure ◽

Atrial Fibrillation ◽

Cardiovascular Disease ◽

Military Service ◽

Secular Trends ◽

Longitudinal Change ◽

Medical Society ◽

Hazard Ratios ◽

Cox Proportional Hazard Models

Abstract Background Cardiovascular disease (CVD) mortality is decreasing in Western countries, including Sweden. However, there are reports of increases in incidence in young people with respect to heart failure (HF) and atrial fibrillation (AF). The magnitude and causes of these changes are only partly known. Aims We investigated secular trends in incidence in CVD outcomes and their attenuation by changes in body mass index (BMI). The outcomes were risk of acute myocardial infarction (AMI), heart failure (HF) and atrial fibrillation (AF) as well as cardiovascular and all-cause death in a population of Swedish adolescents. Methods We followed a cohort of Swedish men enrolled for military service conscription in 1969–1996 (n=1,326,082; mean age=18.3) until December 2016, collected from the national inpatient (IPR) and outpatient registries (OPR). Cox-proportional hazard models were used to analyse the longitudinal change in incidence by with respect to early (0–21 years) of follow-up for subgroups with conscription 1968–1971, 1971–1976, 1976–1981, 1981–1986, 1986–1991, 1991–1996 (with the group born 1971–1976 as reference). Adjustments for potential confounders including BMI were performed. Results We found that CVD and all-cause mortality and MI decreased progressively during the follow-up with hazard ratios (HR) of 0.51, 95% confidence interval (CI) 0.43–0.62, HR 0.51 CI 0.57–0.62, and 0.60 CI 0.50–0.72, respectively. In contrast, we found increases in the incidence of HF (HR 1.86, CI 1.48–2.33], and AF (HR 8.26, CI 6.87–9.92). Adjustments for changes in BMI partly attenuated the changes in secular trends. Cubic spline models showed where the changes in secular trends were most prominent. Conclusion The incidences of cardiovascular outcomes show diverging secular changes. While MI and cardiovascular mortality are continually decreasing, there is an increase in HF and AF. The associations appear to be partly explained by changes in index BMI over time. Acknowledgement/Funding grants from the Swedish Government and the county councils, the ALF–GBG-719761, ALFGBG-751111, Swedish Stroke Association, Göteborg Medical Society

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Intestinales Mikrobiom und kardiovaskuläre Erkrankungen

DMW - Deutsche Medizinische Wochenschrift ◽

10.1055/a-0746-4002 ◽

2019 ◽

Vol 144 (14) ◽

pp. 957-963

Author(s):

Hans-Michael Steffen ◽

Münevver Demir

Keyword(s):

Physical Activity ◽

Risk Factors ◽

Heart Failure ◽

Blood Pressure ◽

Cardiovascular Disease ◽

Vascular Function ◽

Kardiovaskuläre Erkrankungen ◽

Intestinal Microbiome ◽

Current Review

AbstractAging, physical activity, bodyweight and diet are well established risk factors for cardiovascular disease. For all of these factors a great impact on the intestinal microbiome has been described. The current review will discuss available data regarding the role of the gut microbiome in regulating blood pressure, vascular function and its possible contribution to atherosclerosis and heart failure.

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