The Gut–Heart Axis: A Comprehensive Review of Microbiota’s Role in Cardiovascular Health and Disease and Emerging Therapeutic Strategies

Unlocking the gut-heart axis: exploring the role of gut microbiota in cardiovascular health and disease.

Diet is a cornerstone of cardiovascular disease (CVD) prevention and treatment efforts. Step I and Step II diets are widely recommended as the first line of CVD intervention.1 At the core of this dietary guidance are the recommendations to decrease saturated fat and cholesterol and to consume more fruits, vegetables, and whole grain products. Information from an extensive database, especially regarding saturated fat, indicates that these diets significantly lower blood cholesterol levels, a major risk factor for CVD. Consequently, it is beyond debate that these diets reduce CVD risk. Since the advent of Step I and Step II diets, nutritionists have sought to develop effective implementation strategies, including identifying dietary patterns that augment the beneficial effects of these diets. Recent findings indicate that we are making impressive progress in attaining these goals. There is provocative evidence from the Lyon Diet Heart Study2 suggesting that a Mediterranean-style, Step I diet (emphasizing more bread, more root vegetables and green vegetables, more fish, less beef, lamb and pork replaced with poultry, no day without fruit, and butter and cream replaced with margarine high in α-linolenic acid) has effects that may be superior to those observed for the usual Step I diet. These findings raise the interesting, but not yet corroborated, question of whether a modified Step I diet (ie, a Mediterranean-style Step I diet) that features a dietary pattern consistent with the new American Heart Association (AHA) Dietary Guidelines may augment the Step I or Step II diets that are presently implemented in clinical practice. Defining a Mediterranean-style diet is challenging given the broad geographical region, including at least 16 countries, that borders the Mediterranean Sea. As would be expected, there are cultural, ethnic, religious, economic, and agricultural production differences that result in different dietary practices in these areas and that …

As we reach the midpoint of the first decade of the twenty-first century, we are also at the midpoint in the timeline of the American Heart Association (AHA) strategic plan to reduce coronary heart disease, stroke, and risk by 25% by the year 2010.1,2 Encouraging evidence demonstrates important gains toward that goal, with decreases in coronary heart disease and stroke mortality, as well as reductions in certain risk factors such as cigarette consumption and untreated hypercholesterolemia. Still, troubling evidence indicates that other ominous risk factors—physical inactivity, overweight and obesity, diabetes, and hypertension—are on the rise,3 especially among adolescents and young adults, and these may contribute to the next wave of the cardiovascular epidemic. And there is undeniable evidence that not all Americans have shared equally in the improved cardiovascular outcomes. Individuals in specific subgroups defined by race, ethnicity, socioeconomic status, and geography have a disproportionate burden of myocardial infarction, heart failure, stroke, and other cardiovascular events. These individuals also have a worse outcome after these events, including higher mortality rates, and a higher prevalence of unrecognized and untreated risk factors places them at greater likelihood of experiencing these events. Differences such as these arise not only from disparities in access to care and quality of care but also from disparities in awareness and access to knowledge. Disparities in cardiovascular prevention, diagnosis, treatment, and outcomes have been documented in a number of publications from the US Department of Health and Human Services (DHHS),4–6 the Institute of Medicine,7 and the Kaiser Family Foundation,8 and reports of continuing racial and ethnic disparities appear regularly in cardiovascular scientific journals.9,10 If this unacceptable situation fails to be rectified, it is unlikely that the AHA’s 2010 goals or the DHHS Healthy People 2010 goals can be achieved. In the autumn …

Preeclampsia: Exposing Future Cardiovascular Risk in Mothers and Their Children

Cardiovascular (CV) disease (CVD) remains a leading cause of morbidity and mortality worldwide, with growing evidence highlighting the role of diet and the gut microbiome in cardiovascular health (CVH). This review synthesizes the current knowledge on the interactions between dietary patterns, the gut microbiome, and CV outcomes. High-fiber diets, such as the Mediterranean and Dietary Approaches to Stop Hypertension, promote beneficial microbial species, enhancing the production of short-chain fatty acids that exhibit anti-inflammatory and cardioprotective effects. Conversely, Western diets high in fat and low in fiber are associated with microbial dysbiosis and elevated trimethylamine-N-oxide (TMAO) levels, a metabolite linked to increased atherosclerosis and CVD risk. TMAO has been shown to amplify systemic inflammation by upregulating pro-inflammatory cytokines, such as interleukin-6 and tumor necrosis factor-alpha, exacerbating CV damage. This review explores how microbiome composition influences metabolic and immune functions, contributing to systemic inflammation and endothelial dysfunction, which are critical in CVD progression. Personalized nutrition, informed by microbiome profiling, represents a promising avenue for optimizing CVH. Emerging therapeutic strategies, including probiotics, prebiotics, and fecal microbiota transplantation, also offer the potential for modulating the microbiome to improve CV outcomes.

Prevention of Cardiovascular Disease in Persons with Type 2 Diabetes Mellitus: Current Knowledge and Rationale for the Action to Control Cardiovascular Risk in Diabetes (ACCORD) Trial

A microbiome in the gut plays a significant role in cardiovascular health and disease. Dysbiosis is an imbalance in the gut microbiome, leading to multiple cardiovascular diseases (CVD) such as atherosclerosis, hypertension, and heart failure. Gut microbe-derived metabolites such as trimethylamine-N-oxide (TMAO) and short-chain fatty acids (SCFAs) are important mediators of the gut-heart axis. Evaluation of the relationship between the gut microbiome and host biomarkers with CVD requires the integration of metagenomics and metabolomics with meta-omics approaches. The literature review found that microbes and metabolic signatures are associated with the risk and progression of CVD. The development of precision therapeutic approaches for targeting gut microbiota includes preventing adverse microbial effects using probiotics, prebiotics, and the drug-as-bug approach to inhibit harmful metabolites of microbiomes, and fecal microbiota transplantation (FMT). However, the implication and practice of these findings in clinical settings face challenges due to the heterogeneity of study designs, difficulty in the determination of causality, and the impact of confounding factors such as diet, medication, and potential inter-individual gut microbiome variability. Future researchers are recommended to conduct longitudinal studies to further establish both gut microbiome associations with CVD and develop successful precision therapeutics approaches based on the microbiome for the treatment of CVD.

Cardiovascular Protection in People With Diabetes.

Cardiovascular disease (CVD) remains the first cause of mortality globally. Diet plays a fundamental role in cardiovascular health and is closely linked to the development of CVD. Numerous human studies have provided evidence on the relationship between diet and CVD. By discussing the available findings on the dietary components that potentially influence CVD progression and prevention, this review attempted to provide the current state of evidence on healthy dietary choices for CVD. We focus on the effects of individual macronutrients, whole food products, and dietary patterns on the risks of CVD, and the data from population-based trials, observational studies, and meta-analyses are summarized. Unhealthy dietary habits, such as high intake of saturated fatty acids, sugar-sweetened beverages, red meat, and processed meat as well as high salt intake are associated with the increased risk of CVD. Conversely, increased consumption of plant-based components such as dietary fiber, nuts, fruits, and vegetables is shown to be effective in reducing CVD risk factors. The Mediterranean diet appears to be one of the most evidence-based dietary patterns beneficial for CVD prevention. However, there is still great debate regarding whether the supplementation of vitamins and minerals confers cardioprotective benefits. This review provides new insights into the role of dietary factors that are harmful or protective in CVD, which can be adopted for improved cardiovascular health.

Rethinking HDL-C: An In-Depth Narrative Review of Its Role in Cardiovascular Health

Macronutrients and cardiovascular diseases: A narrative review of recent scientific literature.

Introduction to the Compendium on Early Cardiovascular Disease.

An Institute of Medicine report titled U.S. Health in International Perspective: Shorter Lives, Poorer Health documents the decline in the health status of Americans relative to people in other high-income countries, concluding that “Americans are dying and suffering from illness and injury at rates that are demonstrably unnecessary.”1 The report blames many factors, “adverse economic and social conditions” among them. In an editorial in Science discussing the findings of the Institute of Medicine report, Bayer et al2 call for a national commission on health “to address the social causes that have put the USA last among comparable nations.” Although mortality from cardiovascular disease (CVD) in the United States has been on a linear decline since the 1970s, the burden remains high. It accounted for 31.9% of deaths in 2010.3 There is general agreement that the decline is the result, in equal measure, of advances in prevention and advances in treatment. These advances in turn rest on dramatic successes in efforts to understand the biology of CVD that began in the late 1940s.4,5 It has been assumed that the steady downward trend in mortality will continue into the future as further breakthroughs in biological science lead to further advances in prevention and treatment. This view of the future may not be warranted. The prevalence of CVD in the United States is expected to rise 10% between 2010 and 2030.6 This change in the trajectory of cardiovascular burden is the result not only of an aging population but also of a dramatic rise over the past 25 years in obesity and the hypertension, diabetes mellitus, and physical inactivity that accompany weight gain. Although there is no consensus on the precise causes of the obesity epidemic, a dramatic change in the underlying biology of Americans is …

Correction to: Heart Disease and Stroke Statistics-2019 Update: A Report From the American Heart Association.

Many studies,1,2 but not all, have shown that low bone density is associated with increased cardiovascular disease (CVD) risk. Vitamin D deficiency is common in the elderly and is associated with osteoporosis; however, the association of endogenous 25-OH vitamin D (25-OH D) levels with CVD events is controversial.3,4 CVD rates are higher during winter seasons and at increased geographic latitudes where average serum vitamin D levels are lowest.5 Low 25-OH D levels have been found in stroke6 and heart failure patients.7 Moreover, 25-OH D deficiency is associated with hypertension, obesity,8 glucose intolerance,8 and the metabolic syndrome,9 which may be responsible, at least in part, for its association with increased CVD risk. Article p 846 Although vitamin D supplementation improves bone strength, elevated serum vitamin D levels may be associated with lower levels of vascular calcification. In subjects at moderately high risk for coronary heart disease, endogenous serum vitamin D levels were inversely correlated with the extent of coronary artery calcification as determined by cardiac computed tomography.10 Vitamin D also has intriguing antiinflammatory properties11 that have potential therapeutic benefit in several autoimmune diseases and allograft rejection. In 2 small clinical trials,12,13 vitamin D supplementation lowered C-reactive protein levels. Additionally, 1,25(OH)2D induces relaxation of vascular smooth muscle cells …