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.
Hello! You have a fast heart rate. A heart rate over 100 beats per min is considered Tachycardia. If you don't have any symptoms at all like chest discomfort ,short of breath ,palpitations, the feeling that your heart is racing fast ,you don't need to worry.ello! You have a fast heart rate. A heart rate over 100 beats per min is considered Tachycardia. If you don't have any symptoms at all like chest discomfort ,short of breath ,palpitations, the feeling that your heart is racing fast ,you don't need to worry.