Electrocardiogram: This test records the electrical activity of the heart through electrodes attached to the persons skin. Impulses are recorded as waves and displayed on a monitor or printed on paper. This test helps diagnose heart rhythm problems and assess the damage to a persons heart from a heart attack. Echocardiogram: This test for diagnosing and monitoring an enlarged heart uses sound waves to produce a video image of the heart. With this test, the four chambers of the heart can be evaluated. Stress test: A stress test, also called an exercise stress test, provides information about how well the heart works during physical activity. It usually involves walking on a treadmill or riding a stationary bike while the heart rhythm, blood pressure, and breathing are monitored. Cardiac computerized tomography (CT) or magnetic resonance imaging (MRI). In a cardiac CT scan, one lies on a table inside a machine called a gantry. An X-ray tube inside the machine rotates around the body and collects images of the heart and chest. In a cardiac MRI, one lies on a table inside a long tube-like machine that uses a magnetic field and radio waves to produce signals that create images of the heart. Blood tests: Blood tests may be ordered to check the levels of substances in the blood that may show a heart problem. Blood tests can also help rule out other conditions that may cause ones symptoms.
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.