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Quiz yourself by thinking what should be in
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on it to display the answer.
Help!
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| what are the values for triplets HR technique? | 300, 150, 100, 75, 60, 50
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| how do you calculate HR using R to R meathod | count total small boxes X 0.04
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| if r to r cycles vary, use the 6 second method. how do you do this? | count the number of complete QRS complexes in a 6 second strip and multiply by 10
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| how many large boxes are in a 6 sec strip? | 30
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| where do you look for a RBBB | V1 and V2
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| Whaat defines a RBBB? | in RBBB, the QRS comples has 2 r waves which gives a double-peaked appearance in V1 and V2
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| what is an additional way to confirm RBBB diagnosis | I, V5 and V6 the S wave has a slurred appearance or the end of the wave doesnt return sharply back up to baseline
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| where do you look for a LBBB | V5, V6, I
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| Whaat defines a LBBB? | QRS is wide, mostly upright and t waves inverted in leads V5, V6, I
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| what is an additional way to confirm LBBB diagnosis | V1-V3 if the QRS complexes are mostly negative (like big Q waves) and the t waves are upright then confirmation of LBBB
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| what defines a "significant Q wave"? | at least 1 mm wide and greater than 1/3 the R wave
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| what defines ST elevation? | 1 mm above baseline in limb lead, 2 mm above baseline in chest lead, 0.08 sec to right of J point. Lok for in towo or more leads facing same area
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| where do you look for inferior MI? | II, III, AVF
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| where do you look for anterior MI? | V1-V4 (ST segment elevation in V1 and V2 are slightly elevate.. do not over diagnose)
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| where do you look for posterior MI? | V1 and V2 for tall r waves that will not be accompanied by right axis deviation (hard to diagnose)
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| where do you look for lateral MI? | I, AVL, V5, V6 sig Q waves in I and AVL is an old high lateral MI wheras ST segment elevation is called an acute high lateral MI. V5&V6 look at the "low" lateral surface so Q waves or ST elevation in these leads show old and acute "low lateral MI"
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| what is the normal PR interval measure | 0.12-0.20
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| what is the normal QRS measure? | <0.12
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| how do you measure st segment | if difficult to find S wave, go 0.04 sec past R wave to determine S wave. Go 0.08 seconds from s wave to analyze st segment
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| how do you define 1st degree AV block? | PRI > 0.20
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| how do you define 2nd degree, type 1 Mobitz AV block? | successively longer PRI until one qrs fails
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| how do you define 2nd degree, type 2 AV block? | PRI normal or prolongeds, PRI do not lengthen , sudden dropped QRS w/o prior changes
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| how do you define 3rd degree AV block? | no association between atria and ventricles. depolarizing independently
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| what does a RBBB look like on an EKG? | pointed, defined, distinctive R peaks
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| what does a LBBB look like on an EKG? | two R waves, lazy slope in between the Rs - not as defined
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