Background: Myocardial Infarction (MI) is a prevalent condition of heart disease. Despite remarkable growth in the treatment of heart diseases, MI remains the foremost cause of mortality worldwide and a significant pathological concern. Objectives: The primary aim of this work is to analyze the therapeutic activities of flavokawain A on Isoproterenol (ISO)induced MI in rats. Materials and Methods: The rats were administered with ISO (85 mg/kg) in order to induce MI and pretreated with flavokawain A. The heart and body weights of all rats were measured. An analysis was conducted on the levels of uric acid, CRP and total protein. The cardiac function marker enzymes and antioxidant levels were studied using kits. The Na+/K+, Mg2+ activities and Ca2+ ATPase, Na+, K+ and Ca2+ ions, as well as the inflammatory markers and NF-kappa B and HO-1/NQO-1 protein levels, were examined using corresponding kits. Heart samples were subjected to histopathological examination to identify histological alterations. Results: The findings demonstrated that flavokawain A treatment led to an elevation in body weight and a diminution in heart weight in rats with MI. The uric acid and CRP levels were reduced, while the total protein levels are elevated in the flavokawain A-treated rats. The serum levels of cardiac marker enzymes were significantly reduced, but these levels in the cardiac tissues were elevated in MI rats treated with flavokawain A. In addition, flavokawain A enhanced antioxidant levels, reduced inflammatory cytokines and controlled the Na+, K+ and Ca2+ ion levels. Flavokawain A treatment in MI rats considerably enhanced the Na+/K+, Mg2+ and Ca2+ ATPase enzyme activities in their cardiac tissues. Flavokawain A treatment also improved the histological abnormalities in the cardiac tissues. Conclusion: The treatment of flavokawain A significantly enhanced the levels of antioxidants and the Na+/K+, Mg2+ and Ca2+ ATPase enzymes. Additionally, it effectively diminished the inflammatory marker levels and controlled cardiac enzyme activities. Therefore, it has the potential to be an effective treatment option in the future for treating MI.