Actually there could be a better innovation
A deadbeat zero-reset monopusher.
Ok, in these days, they rely on electronic devices to take the pulse. But if one has to go analog, yes any quartz watch will do.
To go fancy and real fit-for-purpose in an analog way, would be a zero-reset button where the seconds hand jumps back to 0 immediately and starts itself. Then one only has to count the heart beats in a frame of time and multiply that.
So far, the closest design is the Rolex Zerographe, but that was meant for aviators. The seconds hand resets to zero when the monopusher is released.
In my opinion, pulsometers with the scales on the bezel are not useful. They have not designed the perfect one yet.
The Sinn EZM12 is pretty good too, utilizing a 4 pronged second hand, eliminating the use of the chrono. But it is too large and busy.