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.
Heart palpitations usually occur sporadically over a period of two to three months. Heart palpitations may accompany hot flashes, another common symptom of menopause, increasing your heart rate between 8 and 16 beats a minute. Some women have been known to experience heart rates of up to 200 beats per minute when experiencing heart palpitations.