When i have orgasm after masturbation i get pause in my heart beat . it pauses then race then pause and race again . it happen 2-3 consecutive . then returns to normal rhytm . is is okay things like this to happen ? i also hold my breath .

Heart rythm: Masturbation causes erection and then ejaculation. This is associated with stimulation of your parasympathetic and then sympathetic nervous system. That would likely be causing your change in heart rate. If brief this should not be an issue. Do the symptoms come on at other times. Troubles with running or activity. and do you feel like passing out? Those would be more concerning.

Palpitations: Ejaculation and orgasm has both sympathetic and parasympathetic nervous system activities that influence heart rhythm and can precipitate premature beats with compensatory pauses, rapid heart rate, and holding your breath may stimulate the vagus nerve which can slow the heart. You can wear a heart monitor which will record your heart rhythm during ejaculation and orgasm to look for worrisome event