Related Questions

How does increased heart rate due to stress result in a heart attack?

Increased rate. Your heart needs blood to function, if it's working harder, it needs more oxygen. If your heart blood vessels can't deliver the extra oxygen, areas of your heart become. Read more...

What causes increased heart rate?

There are multiple. Heart rate usually increases in response to increased demands such as exercise. It may also increase in response to decreased heart function where the higher rate makes up for less blood pumped with each beat. Other diseases, such as hyperthyroidism, can cause an increased heart rate. Fast rhythms can also originate from abnormalities within the heart's electrical system. Read more...