I've been using electronic heart rate monitors for probably 10 years or more. I'm now 3 1/2 years out from AVR/bypass/pacemaker implant. I use a Polar F1 monitor, with the chest strap. It is usually quite good, but sometimes it just "wigs out" and gives erratic high or low readings, or none at all. When I have my pacemaker interrogated, it shows no irregularities in history, so we believe that the rate anomalies shown may be due to the chest strap losing its "connectivity" with the electronic signals from my heart - possibly due to being too wet or too dry as I work out in the fitness center.
When I'm still chugging along on my Airdyne bike but the monitor drops to zero, somehow I don't believe it. . .
When I'm still chugging along on my Airdyne bike but the monitor drops to zero, somehow I don't believe it. . .