Syncope is a sudden lack of blood supply to the brain typically caused by a problem in the regulation of blood pressure or a problem with the heart
Syncope can be broadly classified in 3 categories neural reflex (~60%), orthostatic (~15%), and cardiac (~15%)
>Even in the absence of a firm diagnosis of cardiac syncope, the presence of known structural heart disease (CAD) or evidence a primary electrical disorder is associated with a poor prognosis
Cardiac causes of syncope can also be divided into 3 categories: structural heart disease, obstructive lesions, and arrhythmogenic potential
