i know control by wayne houchin but im not sure if that one works convincingly on me
There are ways given in the Complete Idiot's Guide to Street Magic by Tom Ogden.
Regardless, if you really want to seemingly stop your heartbeat by stopping your pulse, here's some free advice:-
The pulse is just the expansion and elastic recoil of the wall of the radial artery in tune with the blood spurting (during ventricular systole) through it due to the contraction of the ventricle. If you want to stop your pulse, you cannot, of course, stop your ventricle from contacting, but you PREVENT the radial artery from it's momentary 'throb' due to the blood flowing in it, you'll be able to stop your pulse for several minutes on end.
PS:- I used to think that it had become a public domain method but seeing how nobody's sharing the exact method of doing it, I think it's NOT as public I thought... However, basic Biology should help you work out how to achieve what I said.
(Think why your hand goes cold on wearing a tight wristband)