LVADs are often implanted while a patient waits for a heart transplant or, if the patient is not a heart transplant candidate, as a long-term treatment for heart failure. Heart transplant: If medications cant control the symptoms, a heart transplant is often a final option.Cardiomegaly can progress and certain complications are common:

Heart failure: One of the most serious types of enlarged heart, an enlarged left ventricle, increases the risk of heart failure. In heart failure, the heart muscle weakens, and the ventricles stretch (dilate) to the point that the heart cant pump blood efficiently throughout the body. Blood clots: Having an enlarged heart may make one more susceptible to forming blood clots in the lining of the heart. If clots enter the bloodstream, they can block blood flow to vital organs, even causing a heart attack or stroke. Clots that develop on the right side of the heart may travel to the lungs, a dangerous condition called a pulmonary embolism. Heart murmur: For people who have an enlarged heart, two of the hearts four valves — the mitral and tricuspid valves — may not close properly because they become dilated, leading to a backflow of blood. This flow creates sounds called heart murmurs. The exact mortality rate for people with cardiomegaly is unknown. However, many people live for a very long time with an enlarged heart and, if detected early, treatment can help improve the condition and prolong their lives.
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