Random dizzy feel in head. ekg,holter,card profusion scan,echocardiogram,head ct,comp blood work all norm. if it were heart would it come on randomly?

Random dizziness: While dizziness can be related to the heart, even with a totally normal workup of the heart, you could be having an arrhythmia, which might go undetected on a Holter or other tests. It appears that you have had a pretty good heart work up. At this point, with persistent symptoms, you might consider some neurologic tests or inner ear tests. This can be a difficult work up, so please be patient.