Syncope is a symptom in which transient loss of consciousness (T-LOC) occurs as a consequence of a self-limited, relatively brief, and spontaneously self-terminating period of inadequate cerebral nutrient delivery.1 The possible causes of syncope are numerous, but a transient fall of systemic arterial pressure to a level below the minimum needed to sustain cerebral blood flow (i.e., the lower end of the cerebrovascular “autoregulatory” range) is by far the most common. Other causes, such as acute hypoxemia, are possible, but rare.
Multiple System Atrophy Systemic Arterial Pressure Brugada Syndrome Cerebral Hypoperfusion Pure Autonomic Failure
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