second degree block, type 1 may be warning signal of impending of
significant AV conduction disturbance
syncope may result from severe bradycardia or periods of asystole
third degree block
second degree AV block, type 1 - sinus rhythm??
Not a sinus rhythm because you don’t have qrs complex after every P wave
third degree block drugs are used to
temporarily increase HR and support BP before pacemaker insertion
second deg type 2 often progresses to
third degree and is associated with poor prognosis
second degree type 1 aka
type 1 wanckebach widened
2nd degree block, type 1 - most commonly occurs where
at AV node, but can occur in His-Purkinje system
sec deg type 2 tx- before the insertion of a permanent pacemaker may involve use of
temp transvenous or transcutaneous pacemaker
second degree, type 2 almost always occurs when
bundle branch block is present
usually a result of myocardial ischemia or an inferior MI
second degree block, type 1
gradual lengthening/widening of PR interval because of prolonged AV conduction times
second degree AV block, type 1
second degree block, type 2
P wave not conducted; no progressive antecedent PR lengthening
second degree type 2 - temp drug measures to do what
increase HR until pacemaker is available
second degree block, type 1 usually a result of
2
myocardial ischemia
inferior MI
3rd degree block
complete heart block; constitutes 1/4 of AV dissociation in which no impulses from atria are conducted to ventricles
type 1 wanckebach widened aka
second degree AV block, type 1
atrium and ventricles are firing but not together; divorce =
third degree heart block
second degree type 2 - PR interval
no widening of PR interval; normal and then nothing, no warning
total heart block CO
very low
second deg type 2 may result in decreased what
CO with subsequent hypotension and myocardial ischemia
second degree block, type 2 tx if asymptomatic
rhythm closely observed with transcutaneous pacemaker on standby
drug for second degree type 2
atropine
second degree block, type 1 tx if symptomatic
2
atropine is used to increase HR or pacemaker may be needed
P wave not conducted; no progressive antecedent PR lengthening
second degree block, type 2
2nd degree AV block, type 1 includes
gradual lengthening of the PR interval, which occurs because of prolonged AV conduction time
second degree type 2 - certain number of impulses from the sinus node are not
conducted to the ventricles
gradual lengthening of the PR interval, which occurs because of prolonged AV conduction time
second degree block, type 1
second-degree block, type 1 - what do you see on EKG
PR gradual widening until you finally drop QRS complex
no widening of PR interval; normal and then nothing, no warning
second degree type 2
dropping beat with no warning sign
second degree type 2
third degree block - almost always results in
reduced CO with subsequent ischemia and HF
PR gradual widening until you finally drop QRS complex
second degree block, type 1
third degree block tx- temporary what
transvenous or transcutaneous pacemaker may be used on an emergency basis in a patient with acute MI