Other doctors have expressed their concerns.
Internal jugular vein (IJV) is a main extracranial route for cerebral venous drainage. The jugular venous valves, which are located near the junction with the innominant vein, prevent the transmission of thoracic pressure and the reflux of venous blood into the cerebral circulation. Jugular valve insufficiency could result in retrograde jugular venous flow and back transmission of central venous pressure.
http://www.unboundmedicine.com/medline/ ... disorders_
Please read Dr. Chung's extensive research on transient global amnesia and valsalva manuever in those with internal jugular valve insufficiency. Venous reflux and incompetent valves are related to ischemic events and white matter lesions in the elderly.
We need working jugular vein valves. Unless you plan on never turning your head upside down, or sneezing, or straining on the john, or lifting something, or getting stressed, or having sex, or doing the myriad of everyday activities that causes blood to go back up the jugular veins and into the brain. The IJVVs are the only thing between the heart and the brain protecting from venous backflow...and we are JUST beginning to learn about their importance.
http://www.biomedsearch.com/nih/Pathoge ... 72657.html
Dr. Zamboni and his team are looking at ways to create new valves. Please, until there is more research, do not have valves disrupted, burst, popped, torn, whatever. There is just no science to back it up.