Vasovagal syncope is a temporary loss of consciousness. The vasovagal response, in which your blood pressure suddenly drops, causes you to faint. Passing out in response to unpleasant conditions ...

Careful evaluation of a patient's clinical history and physical examination can help establish the underlying cause of syncope in more than 25% of cases, and can guide investigation strategies in ...

and orthostatic syncope (9.4%); in 36.6% of patients, the cause of syncope was unknown. In those patients with VVS, the presence of cardiovascular disease contributed to higher rates of occurrence ...

It is important to note that another cause of syncope in patients with aortic stenosis is arrhythmias, especially atrial fibrillation and AV nodal blocks; this is described later in this section.

Heat syncope Reduced blood flow to the brain due to dehydration, leading to temporary loss of consciousness causes heat syncope. Fainting or lightheadedness, often occurring after prolonged ...