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Rhabdomyomas are the most common type of cardiac tumors in infants and children. These benign tumors tend to present in groups and may be found most commonly in the right and left ventricle heart muscle.
Tuberous sclerosis, a genetic disorder that causes tumors to form in many different organs, has been reported in up to 60-80% of patients diagnosed with rhabdomyomas.
The effects of rhabdomyoma on heart function depend on their size and location. Rhabdomyomas can affect a baby's heart rhythm and the ability of the heart muscle to squeeze effectively.