I was told I have were a mild numbers of asystoles during my sleep test. What does this mean and should I see a heart doctor?

Sleep apnea. Sleep apnea can cause your heart to slow down during your hypoxia spells usually goes away when you treat your sleep apnea.
Maybe. I am going to assume these are really episodes in which the heart stopped for seconds, rather than some non-expert mistaking an "extrasystole" (irregular beat). Get the exact facts, then visit with your physician about the need for a cardiology referral.