CH17: Faintness and Syncope Flashcards
heightened vagal discharge producedby compression of the eyeballs (p. 403)
oculovagal reflex
how many seconds after a cardiac arrest, there will be LOC (p. 403)
7-13s
EEG finding 7-13s after cardiac arrest (p. 403)
bilateral synchronous theta and delta waves in frontal lobes
how many seconds after cardiac arrest, will the EEG be flat? (p. 403)
15s
nucleus in the medulla which intergrates the afferent stimuli and normal baroreceptor signals with teh efferent sympathetic mechanisms to maintaint vascular tone (p.404)
NTS
Unmyelinated fibers cease firing during vasovagal fainting at a point when the blood pressure falls below to this level (p. 404)
80/40
inferoposterior wall of the left ventricle as site of the most subendocardial mechanoreceptor responsible for afferent impulses to the NTS (p. 404)
inferoposterior wall of the left ventricle
heart as source of vasodepressor reflex (p. 404)
Bezold- Jarisch reflex
In this disease, bradycardia exceed rthose of the vasodepressor hypotension (p. 405)
Glossopharyngeal Neuralgia
drug of choice for deglutitional syncope
Propantheline
intolerance of the standing position accompanied by tachycardia up to 120 beats per minutes but WITHOUT orthostatic hypotension (p. 407)
POTS
neruronal degeneration limited to the sympathetic neurons of hte intermediolateral cell coulmn (p. 407)
Shy Drager syndrome
how many seconds after ventricular arrest if the patient is upright will cause syncope (p. 407)
4-8s
right bundle branch block and ST segment elecation in teh R precordial leads causing syncope (p. 408)
Brugada syndrome
Meniere’s disease with a apatient suddenly thrown to the ground (p. 409)
otolithic catastrophe of Tumarkin
