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.