Hi,
Your proper history about hearing heartbeat in left ear on laying on left side, vanishing on pressing on left side of the neck indicate the following:
The commonest possibility is an
arterial aneurysm hear the internal ear structure wherein the arterial pulsations are felt as hearing; stopping on pressure on neck on left side as this is blocking the arterial supply to the area.
This can be confirmed by the following ways:
Arteriography is hte best way to have a proper diagnosis.
Then get an opinion of an ENT Surgeon who is well experienced in such cases as only the most experienced one can operate on this most complex surgery.
You have to find the best one in your area.
Also rule out
hypertension as probable cause.
Any other investigations like
Audiometry, neurological evaluation should be done before surgery.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. T. Chandrakant, General and ENT Surgeon