My echocardiogram came back normal with trace regurgitation and "mildly" enlarged right ventricle... but i have what appears to be a de mussett sign - head bobby in synchronicity to my heart beat, which is indicative of severe aortic regurgitation?

If you had severe aortic regurgitation, this would have shown on an echocardiogram. Did your cardiologist interpret the echocardiogram and discuss it with you? If your cardiologist who knows your clinical situation the best is saying there is no severe aortic regurgitation, you could get a second opinion if you think this is still a possibility. Good luck to you!

Severe aortic regurgitation would not be missed on an echocardioram, would be associated with enlargement of the left ventricle and would cause you to have a loud diastolic.murmur heard when your heart is examined with a stethoscope. I trust you've been examined & advised by a cardiologist. Continual head bobbing can be caused by familial essential tremor.