If you have a cell phone with a camera, consider getting a free heart rate monitor app for it; it lights the camera light and you put your finger over it and the camera lens and the app the graphically shows your heart beats, most apps with sound, and you can SEE the beats STRENGTH so you can see each beat, and if there are extra ones that are only 1/2 as powerful, and of course you can see the missing beats. I commend your doctor for suggesting you learn more about your own body! And the free cell phone app is a grand way to learn! (I have AFIB and keep tabs on it this way)