Cancer-related anemia can also cause your heart to beat differently. You may have a very fast or irregular heartbeat.
People with cancer may also develop high levels of calcium in their body, called hypercalcemia. Hypercalcemia can also affect your heart rate, putting you at risk for heart attack or even coma.
While cancer isn’t the only cause of a racing heart, many causes are serious. Always talk to your doctor about changes in your heart rate.
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