Five possible causes of passing out with similar conditions to playing and releasing extended high notes on a trumpet. Material taken from Wikapedia.com 1. Syncope (faint) is a sudden fall of blood pressure resulting in loss of consciousness. 2. Valsalva maneuver or Valsalva manoeuvre. The Valsalva maneuver is performed by attempting to exhale against a closed airway. This can be done by keeping the mouth closed and pinching the nose while trying to breath out. This maneuver greatly increases pressures inside the chest cavity – which stimulates the vagus nerve and increases vagal tone. 3. Orthostatic hypotension, also known as…