This project characterizes chamber-specific proteomic remodeling in a murine three-hit HFpEF model that develops right ventricular dysfunction, using chow, hypoxia alone, and HFD+L-NAME as control conditions. The three-hit model (hypoxia, high-fat diet, and L-NAME) recapitulates key features of human HFpEF, including left ventricular diastolic dysfunction and secondary right ventricular hypertrophy and dysfunction.