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Cardiologist

Real-Life Activities

Real-Life Math

Cardiologists use math to read and evaluate test reports such as angiograms. To obtain an angiogram, a person has a radiopaque substance (a substance that will be visible on an X-ray) introduced into their system. Then an X-ray is taken of the person's blood and lymph vessels.

"Cardiologists have to use a lot of complex math," says Denise Wasko, manager of a cardiology office. "They measure gradients on angiograms, pressures, percentage increases or decreases in the heart, and changes in blood flow."

You are the cardiologist for a patient named Myra. She has an irregular heartbeat, so her heart was monitored over a 24-hour period. You look over the report.

Myra's heart beats 70 times per minute. At this rate, how many times did it beat over a 24-hour period?

If her heartbeat per minute increased by 20 percent, how many times did it beat over 3 hours at the new rate?

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