“Syncope” occurrence | AIPGDEE Guide

“Syncope” occurs while operative processes due to:
A. Cerebral edema  
B. Cerebral hyperemia
C. Cerebral hypoxia              
D. Cerebral degeneration

.  Ans. (C) Cerebral hypoxia: 

- Cerebral syncope is caused by a sudden drop in cardiac output and cerebral perfusion due to an arrhythmia or a mechanial problem.

- Inappropriate Vasodilatation also causes symptoms by reducing cerebral perfusion”- 

- Syncope or fainting is perhaps the most frequently complication associated with local anesthesia in the dental office.

- This is a form of neurogenic shock and is cause by cerebral ischemia secondary to vasodilatation or an increase in the peripheral vascular bed, with a corresponding drop in blood pressure