Effect of Electroacupuncture at Neiguan (PC6) Combined With Zhigancao Decoction on Atrial Electromechanical Coupling and Inflammatory Cytokines in Patients With HFpEF and Atrial Fibrillation - Beibei Shi; Jinyi Jiang (Acupuncture & Electro-Therapeutics Research: International Journal of Integrated Medicine, 2026)