9.9.2013(syncope) Flashcards
define syncope
transient,self limited loss of consciousness due to global cerebral ischemia
course of syncope
rapid onset
brief duration
spontaneous and complete recovery
presyncope
dizziness
lightheadedness
fatigue
auditory or visual disturbance
three broad etiological catagories of syncope
reflex or neurally mediated syncope
orthostatic syncope
cardiac syncope
most common type of syncope
reflex
Standing results in pooling of _________ ml of blood in lower limbs and splanchnic circulation
500-1000ml
type of headache in orthostatic hypotension
coat hanger headache
heart rates above which ventricular tachyarrythmias cause syncope
200
stoke adams attack
syncope due to asystole or bradycardia
cause of syncope in tachycardia bradycardia syndrome
prolonged pause following tachycardia
Indications for carotid sinus massage
recurrent syncope of unknown etiology in pts over 50 yrs
contraindications due to carotid sinus massage
bruit,plaque,stenosis
blood pressure during asystole
10-20mm Hg
Diff btw syncope due to ventricular tachycardia and stoke adams attack
LOC occurs later(20-120s) in ventricular tachycardias
first sign of an impending vasovagal faint
facial pallor
cerebral ischemic anoxia reserve time
7s
Most consistent ocular motor sign accompanying syncope
Upward turning of eyes which may be preceded by downbeat nystagmus
post ictal flushing after syncope indicates
sudden onset of syncope followed by rapid overshoot of pressure
Cause of persistence of pallor and oliguria after a vasovagal attack
vasopressin release
retrograde amnesia after vasovagal faint is common in
elderly
diff btw epileptic and psychogenic seizures
eyes are open during epileptic seizures
condition where syncope is caused by epilepsy
temporal lobe seizures causing arrythmias
