Immunophenotypes and prognosis in autoimmune cardiovascular disease: a narrative review from clonal hematopoiesis to myocarditis, microvascular angina, and HFpEF

Autoimmune cardiovascular disease (CVD) includes myocarditis, coronary microvascular dysfunction (CMD), and heart failure with preserved ejection fraction (HFpEF). Traditional risk scores often overlook these conditions despite their links to high morbidity. Recent research highlights the significance of immunophenotyping, such as clonal hematopoiesis of indeterminate potential (CHIP), type I interferon activity, Th17/Treg imbalance, and cardiac autoantibodies, to improve risk assessment and guide treatment. This review combines mechanistic and clinical data connecting these immune signatures to endothelial dysfunction, arrhythmias, and fibrotic remodeling. It underscores the atherogenic role of CHIP and its influence on HFpEF prognosis, the vasculopathy driven by type I interferon signaling in CMD, and autoimmunity in myocarditis mediated by Th17 dominance. Cardiac-specific autoantibodies, like anti-heart and v1-adrenergic receptor antibodies, serve as early prognostic markers. Moreover, integrating immune biomarkers with advanced imaging techniques, such as cardiac magnetic resonance and positron emission tomography, could enhance risk stratification and therapy monitoring. Current immunomodulating treatments, including TNF and IL-6 inhibitors, provide cardiovascular benefits, while glucocorticoids and JAK inhibitors carry dose-related risks. In the future, personalized algorithms that incorporate CHIP genotyping, interferon scoring, and continuous biomarker and imaging assessments may transform autoimmune CVD management. This review highlights these translational insights and research priorities to bridge the gap between immune dysregulation and cardiovascular outcomes.