You must be at least 17 years old to donate to the general blood supply, or 16 years old with parental/guardian consent, if allowed by state law. Learn more about the reasons for a lower age limit.
Other Causes of Elevated Heart Rate. Elevated heart rate when sick is actually your heartâs aid in order to quell the sickness. However, there can be other causes for elevated heart rate as well. Electrical signals produced and sent to the heart tissues are responsible for controlling the heart rate.
The normal rate is 60â100 beats per minute. Some athletes may have slower normal rates because their heart pumps blood so efficiently. Then check your pulse without counting to get a feel of what a normal rate is so that if you donât have a watch when you need it, you can discern when itâs beating way too fast.irst, when the rateâs that fast, the heart canât efficiently empty the blood from its chambers. Second, those chambersâ pumping rhythms can get out of sync. (Normally your atria pump blood to your ventricles, which pump it out milliseconds later. You can hear that when you listen through a stethoscope. Tadump, tadump.