A Diagnostic and Treatment Strategy for Syncope

Posted by e-Medical PPT Friday, August 20, 2010
Syncope is the medical term for fainting, a sudden, usually temporary, loss of consciousness generally caused by insufficient oxygen in the brain either through cerebral hypoxia or through hypotension.Typical symptoms progress through dizziness, clamminess of the skin, a dimming of vision or greyout, possibly tinnitus, complete loss of vision, weakness of limbs to physical collapse.
Vasovagal syncope—one of the most common types which may occur in scary, embarrassing situations, or during blood drawing, coughing, urination or defecation. Other types include postural syncope , cardiac syncope , and neurological syncope .There are many other causes of syncope, including low blood-sugar levels and lung disease such as emphysema and a pulmonary embolus.Cardiac causes of syncope can be fatal. Cardiac arrhythmias is the most common cause of cardiac syncope. Two major groups of arrhythmias are bradycardia and tachycardia. Bradycardia can be caused by heart blocks. Tachycardias include supraventricular tachycardia and ventricular tachycardia. SVT does not cause syncope except in Wolff-Parkinson-White syndrome.Other important cardio-vascular conditions that can be manifested by syncope include subclavian steal syndrome,Aortic dissection,Cardiomyopathy and Aortic stenosis.

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