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.
If you are taking Hormone Replacement Therapy HRT you may also be ware of an increase in episodes of heart palpitations at the beginning of your treatment. Menopause heart palpitations can increase your heart rate between 8 and 16 beats per minute.