GLP-1 Agonists in Cardiovascular Diseases: Mechanisms, Clinical Evidence, and Emerging Therapies.
This review examines the expanding cardiovascular applications of glucagon-like peptide-1 (GLP-1) receptor agonists, a class of peptide-based agents originally developed for type 2 diabetes management. The authors synthesize molecular mechanistic data alongside clinical evidence from major cardiovascular outcome trials (CVOTs) to characterize how GLP-1 agonists may reduce risk across conditions including atherosclerosis, heart failure, stroke, and vascular dementia. Proposed mechanisms discussed include anti-inflammatory, anti-atherogenic, endothelial-protective, and direct cardioprotective effects. The review highlights findings from multiple CVOTs reporting reductions in major adverse cardiovascular events (MACEs), myocardial infarction, stroke, and cardiovascular mortality. Notably, the SELECT trial is cited as evidence extending potential benefit to non-diabetic individuals with obesity and established CVD. The review also addresses emerging dual GLP-1/GIP agonists such as tirzepatide and its own CVOT data. The authors acknowledge important limitations, including high drug costs, unresolved long-term safety questions, and real-world implementation barriers. As a narrative review, this paper does not generate primary data and is subject to the inherent risk of selective literature synthesis. It provides a useful conceptual overview but does not independently establish causality or efficacy.
Why this grade: This is a narrative review synthesizing existing mechanistic and clinical literature; it generates no primary data and its evidence grade reflects the aggregated, interpreted nature of the source material rather than a single direct trial.
Glucagon-like peptide-1 (GLP-1) receptor agonists now serve as therapeutic agents for cardiovascular diseases (CVDs) beyond their original use for treating type 2 diabetes mellitus (T2DM). This review combines molecular mechanisms with clinical evidence to demonstrate how GLP-1 agonists help lower cardiovascular risk for conditions, including atherosclerosis, heart failure, stroke, and vascular dementia. These agents produce multiple beneficial effects, which include anti-inflammatory action along with anti-atherogenic effects, endothelial-protective benefits, and cardioprotective actions to minimize major adverse cardiovascular events (MACEs). GLP-1 agonists achieved substantial reductions in myocardial infarction, stroke, cardiovascular mortality, and heart failure events according to major cardiovascular outcome trials (CVOTs). Recent research, notably the pivotal SELECT trial, has confirmed their suitability for non-diabetic subjects with obesity and established CVD. New drug delivery methods and dual GLP-1/glucose-dependent insulinotropic polypeptide (GIP) agonists demonstrate potent efficacy, with tirzepatide showing significant MACE reduction in its own CVOT. However, significant challenges related to high cost, long-term safety uncertainties, and implementation barriers remain, requiring a balanced perspective. The review presents both mechanistic data and clinical evidence to demonstrate how GLP-1 agonists function as vital cardiovascular medications and outlines future research directions to address critical evidence gaps and maximize their therapeutic effectiveness.
Educational summary of published research — not medical advice. License: cc by. Full text is shown only where licensing permits.