People who faint need to think carefully about what and how much they drink. Think of your body as a water tank with a minimum level needed to feed to brain with blood and oxygen to keep alert and conscious. If the water tank level drops below this minimum level you are “dehydrated”. For people who faint, it is crucially important to keep this tank as full as possible so that even if the level drops (pools due to gravity) into your lower limbs, which can act as large collecting vessels in your legs, there is still enough supply to the brain.

Dr. Vasilis Kouranos is Consultant Respiratory Physician at Here at OneWelbeck as well as Royal Brompton Hospital with expertise in interstitial lung disease and sarcoidosis. He has strong clinical and academic interest in the risk stratification of interstitial lung disease and sarcoidosis.

A vasectomy is a surgical procedure performed on males as a form of permanent contraception or sterilization.

A vasectomy reversal is a surgical procedure which is most commonly done to restore fertility, and occasionally to treat testicular pain after a vasectomy.

A stroke is a serious medical condition that happens when there is a problem with the blood supply to part of the brain, resulting in damage to brain cells.

The service offers a variety of vascular scans using ultrasound imaging, which has many advantages such as being non-invasive, and radiation free. Vascular ultrasound is used to evaluate the blood flow in the arteries and veins of the arms, neck and legs. Your clinician will use the test to diagnose blood clots and peripheral artery disease.

Dr Amanda Varnava is a consultant cardiologist at OneWelbeck Heart Health.

Varicocele is a common condition affecting men and presents as enlarged veins around the testicle.

Dr Mark Vanderpump is a consultant physician and endocrinologist specialising in thyroid disease and reproductive endocrinology.

A TAVI is a procedure to treat a severely narrowed aortic valve.