Doctors rule out conditions that cause symptoms that resemble seizure disorders, including small strokes (transient ischemic attacks, or TIAs), fainting (syncope), pseudoseizures, and sleep attacks (narcolepsy).
Understanding Hot Weather and its Dangers provides additional information on identifying and preventing heat cramps, heat syncope or fainting, heat exhaustion and heatstroke.
Syncope is associated with low blood pressure, heart problems, and disorders in the autonomic nervous system, the system of involuntary functions such as breathing.
Up to 17 percent of children with pallid BHS will experience syncope (fainting spells) as adults, usually in response to fear, injury, or emotional stress.
In general, syncope is defined by a brief loss of consciousness (fainting) or by dimmed vision and feeling uncoordinated, confused, and lightheaded.
"Syncope." In Cecil Textbook of Medicine, 22nd ed. Edited by Lee Goldman et al. Philadelphia: Saunders, 2003, pp. 2268-71.
The symptoms of syncope include dimmed vision, loss of coordination, confusion, lightheadedness, and sweating.
The presence of toxins in the blood not only affects the brain, causing delirium, but also other organs, the heart and lung, and may cause fatal syncope or respiratory failure.
If he recovers from the depression, the local symptoms begin to play a much more important part than in cobra-poisoning: great swelling and discoloration extending up the limb and trunk, rise of temperature and repeated syncope, and laboured respiration.
Ten to twenty minims of ether, subcutaneously injected, constitute perhaps the most rapid and powerful cardiac stimulant known, and are often employed for this purpose in cases of syncope under anaesthesia.