The Basics of Metabolic Dysfunction–Associated Steatotic Liver Disease for Cardiologists

Pathophysiology, Diagnosis, and Treatment

Muhammad Shahzeb Khan, MD, MSC; Syed Sarmad Javaid, MBBS; Amreen Dinani, MD; Kara Wegermann, MD; Ambarish Pandey, MD; Ankeet S. Bhatt, MD, MBA, SCM; Mark Muthiah, MBBS; Harriette G.C. Van Spall, MD, MPH; Faiez Zannad, MD, PHD; Javed Butler, MD, MPH, MBA; Michael L. Volk, MD; Marat Fudim, MD, MHS

Disclosures

J Am Coll Cardiol. 2025;86(20):1861–1884 

In This Article

Abstract and Introduction

Abstract

Metabolic dysfunction–associated steatotic liver disease (MASLD) is now recognized as a multisystem disease closely linked to cardiovascular disease, which is the leading cause of death in this population. MASLD and cardiovascular disease share overlapping pathophysiological mechanisms including insulin resistance, chronic inflammation, oxidative stress, and endothelial dysfunction that not only drive the progression of each disease but may also potentiate one another. Recent initiatives, such as the cardiovascular-kidney-metabolic health framework and the cardiovascular-renalhepatic- metabolic model, underscore the importance of integrated, multidisciplinary care for managing multisystemic conditions like MASLD. In this context, cardiologists who frequently encounter MASLD-related comorbidities such as diabetes and obesity are well positioned to lead efforts in early detection, risk stratification, and management. This review offers cardiologists a comprehensive overview of MASLD, including the epidemiology, diagnostic approaches, and therapeutic options of MASLD while highlighting cardiologists’ pivotal role in its multidisciplinary management.

Introduction

Metabolic dysfunction–associated steatotic liver disease (MASLD), formerly known as nonalcoholic fatty liver disease (NAFLD), is one of the fastest-growing causes of chronic liver disease in the United States. Globally, MASLD affects about one-third of the population, with a higher prevalence among male (40%) compared with female (26%) individuals.[1] In the United States, MASLD has now become the leading indication for liver trans- plantation, reflecting its growing clinical and public health burden. Although traditionally regarded as a liver-specific condition, growing evidence suggests that MASLD is a multisystem disease, linked to a range of extrahepatic conditions such as cardiovascular disease (CVD).[2] In fact, CVD is the leading cause of mortality in individuals with MASLD.[3] A meta-analysis involving 34,043 patients demonstrated a significantly increased risk of both fatal and nonfatal cardiovascular (CV) events among those with MASLD.[4] Given this substantial burden, the relationship between MASLD and CVD has gained increasing attention within the field of cardiology.

Reflecting this evolving perspective, recent initiatives have emphasized the need for an integrated, multidisciplinary approach to the management of MASLD and related cardiometabolic disorders.[5] In 2023, the American Heart Association (AHA) introduced the cardiovascular-kidney-metabolic health (CKMH) initiative, which calls for closer collaboration among cardiology, nephrology, and endocrinology to address overlapping pathophysiological processes.[6] Building on this model, the cardiovascular- renal-hepatic-metabolic (CRHM) framework was developed to further recognize the impact of MASLD and its progression to metabolic dysfunction–associated steatoheatitis (MASH) on cardiometabolic outcomes.[7] In parallel, there is growing recognition that the liver is not peripheral to CV health, prompting calls for the inclusion of individuals with MASLD in cardio-renal-metabolic clinical trials.[8]

MASLD and CVD share key risk factors and converge on common pathological pathways, such as insulin resistance, chronic inflammation, oxidative stress, and endothelial dysfunction.[9] Each condition may exacerbate the other’s progression. As a result, MASLD falls well within the scope of contemporary cardiology practice. Cardiologists routinely manage patients with metabolic comorbidities such as diabetes, obesity, and dyslipidemia, all of which are closely tied to MASLD. In addition, cardiologists frequently encounter clinical manifestations of hepatic dysfunction, including heart failure with preserved ejection fraction, atherosclerosis, and arrhythmias. These intersections highlight the need for cardiologists to develop a solid understanding of MASLD to effectively contribute to integrated care within multidisciplinary teams.

In this context, this article presents a comprehensive review of MASLD geared toward the practicing cardiologist. We discuss the disease’s definition, epidemiology, risk factors, diagnostic tools, and therapeutic options, while also summarizing current evidence linking MASLD to a range of CV conditions. In addition, we highlight the key role of cardiologists in multidisciplinary care, with a focus on early detection, risk assessment, and timely intervention to improve outcomes in MASLD.

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