I have heart palpitations while I'm sleeping that wake me up, what should I do? I haven t seen a cardiologist yet but my doctors say I have Mobitz type I. I have not been able to find any evidence that this type of arrhythmia would cause night time palpitations. When I roll onto my stomach or side, my heart starts to pound and race, waking me up many times in the night. Does anyone know what this could be and what I could be doing about it (besides seeing a cardiologist, I already have an apointment with one coming up soon.) My blood chem. is normal and my cholesteral is normal, I m 27, married without kids and in college.