arrhythmia Flashcards
(29 cards)
automatic atrial tach characteristic
non paroxysmal ectopic focus in atria. may precede flutter or fib
paroxysmal atrial tach characteristic
typically involves the AVN and reentry through an accessory path initiated by extrasystole,
how to treat PAT
responds to vagal, adenosine, BB, CCB
junctional tach characteristic
nonparoxysmal ectopic focus in the bundle os His next to AVN. there will be inverted P waves short PR intervals and QRS.
how to treat junctional
slowed by vagal and adenosine
what causes junctional
cardiac glycosides
sinus node reentry characteristic
paroxysmal
how to terminate SN reentry
electrical stimulus
atrial reentry
paroxysmal extrasystole initiates,
how to stop atrial reentry
electrical
AVN reentry characteristic
dual conduction path paroxysmal initiated by extrasystole,
how to treat AVN node reentry
vagal tone adenosine BB and CCB
WPW characteristic
fast AVN accessory path usually of atrial origin bundle of kent. initiated by extrasystole. shorted PR interval. pre-excitation delta wave with a wide QRS.
what is contraindicated in WPW
AVN blockers.
how to treat WPW
amiodarone, procainamide cardioversion, ablation
is wpw responsive to vagal
no
what are people with wpw at higher risk for?
sudden cardiac death
ventricular tachycardia monomorphic characteristic
spontaneous extrasystole sustained
v tach polymorphic characteristic
nonuniform torsades de pointes long QT sundrome. it can be catecholamine induced, DAD-mechanism with extrasystoles, deficient Ca cycling. can be exercised induced, BB, ICD, or left cardiac sympathectomy
atrial flutter characteristic
rapid atrial HR. sawtooth pattern. normal QRS AV dissociated gives regular pattern.
how to treat A-flutter
non life threatening unless transmitted to ventricles at rapid rate.
does vagal stimulus work for a flutter
no
do CCB work for A flutter
no
atrial fib characteristic
most common. leading cause of stroke. irregular rate of 400-600
