Angiotensin receptor blockers (ARBs): to provide the benefits of ACE inhibitors for those who cant take ACE inhibitors. Beta blockers: to lower blood pressure and improve heart function. Digoxin: to help improve the pumping function of the heart and lessen the need for hospitalization for heart failure. Anticoagulants: to reduce the risk of blood clots that could cause a heart attack or stroke. Anti-arrhythmics: to keep the heart beating with a normal rhythm.Medical devices to regulate the heartbeat

Pacemaker: Coordinates the contractions between the left and right ventricle. In people who may be at risk of serious arrhythmias, drug therapy or an implantable cardioverter-defibrillator (ICD) may be used. ICDs: Small devices implanted in the chest to constantly monitor the heart rhythm and deliver electrical shocks when needed to control abnormal, rapid heartbeats. The devices can also work as pacemakers.Surgical procedures

Heart valve surgery: If an enlarged heart is caused by a problem with one of the heart valves, one may have surgery to remove the valve and replace it with either an artificial valve or a tissue valve from a pig, cow or deceased human donor. If blood leaks backward through a valve (valve regurgitation), the leaky valve may be surgically repaired or replaced. Coronary bypass surgery: If an enlarged heart is related to coronary artery disease, one may opt to have coronary artery bypass surgery. Left ventricular assist device: (LVAD): This implantable mechanical pump helps a weak heart pump.
For some people cardiomegaly is a temporary condition, which can resolve on its own, making ones lifestyle normal like before. Others may have a permanent enlargement, which would then need to be taken care of by the above treatment options.Lifestyle changes

Smoking cessation
Limiting alcohol and caffeine intake
Maintaining a healthy weight
Increasing fruits and vegetables in a daily diet
Limiting consumption of high-fat and/or high-sugar foods
Getting adequate restful sleep

References
Further reading
Amin, Hina; Siddiqui, Waqas J. (2019). "Cardiomegaly". StatPearls. StatPearls Publishing. PMID 31194436. Ampanozi, Garyfalia; Krinke, Eileen; Laberke, Patrick; Schweitzer, Wolf; Thali, Michael J.; Ebert, Lars C. (1 September 2018). "Comparing fist size to heart size is not a viable technique to assess cardiomegaly". Cardiovascular Pathology. 36: 1–5. doi:10.1016/j.carpath.2018.04.009. PMID 29859507. S2CID 44086023. Agostoni, PierGiuseppe; Cattadori, Gaia; Guazzi, Marco; Palermo, Pietro; Bussotti, Maurizio; Marenzi, Giancarlo (1 November 2000). "Cardiomegaly as a possible cause of lung dysfunction in patients with heart failure". American Heart Journal. 140 (5): A17–A21. doi:10.1067/mhj.2000.110282. PMID 11054632. Luedde, Mark; Katus, Hugo; Frey, Norbert (1 January 2006). "Novel Molecular Targets in the Treatment of Cardiac Hypertrophy". Recent Patents on Cardiovascular Drug Discovery. 1 (1): 1–20. doi:10.2174/157489006775244290. PMID 18221071. External links

American Heart Association