Cardiac senescence emerges from at least four pathological communication axes — epicardial adipose tissue-heart, skeletal muscle-heart, gut-heart, and kidney-heart — each trafficking distinct molecular signals including TMAO, inflammatory cytokines, lipotoxic metabolites, RAAS effectors, and extracellular vesicle cargoes. These signals converge onto three shared downstream pathways: oxidative stress amplification, impaired autophagy, and cellular senescence programming, effectively converting localized organ dysfunction into systemic cardiovascular aging.
The intellectual contribution here is organizational rather than empirical — this is a review synthesizing existing mechanistic evidence into a unified crosstalk framework. That said, the framework carries real clinical heft. TMAO's cardiac toxicity, SGLT2 inhibitors' cardioprotective pleiotropism, and senolytics' ability to clear senescent cells are individually well-supported; placing them within a single convergent model highlights why single-target interventions so often underperform in cardiometabolic disease. The emphasis on extracellular vesicles as crosstalk carriers is particularly timely, given the explosion of EV research as both biomarkers and therapeutic vehicles. For adults, the takeaway is that cardiac aging is mechanistically addressable through lifestyle levers — exercise-derived myokines, gut microbiome modulation, caloric quality — well before pharmacological senolytics become standard care. The framework's limitation is its theoretical nature; no novel data are presented, and causal hierarchies between axes remain unestablished. Still, as a conceptual scaffold for future intervention trials, this is a well-structured and practically orienting synthesis.