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In page Cardiomegaly:

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The exact mortality rate for people with cardiomegaly is unknown. However, many people live for a long time with an enlarged heart and, if detected early, treatment can help improve the condition and prolong their lives.[1]

  • Heart murmur: Two of the heart's four valves – the mitral and tricuspid valves – may become dilated and not close properly, leading to a backflow of blood. This flow creates sounds called heart murmurs.[citation needed]
  • Cardiomegaly may be a temporary condition that can resolve on its own.[citation needed]