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mayo ecg exam with correct answers
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mayo ecg exam with correct answersSinoatrial iiNode ii(SA iinode; iiSinus iiNode) ii- iiAnswers ii-Located iiin iiRA iinear iisuperior
iivena iicava
Normal iipacemaker iiof iithe iiheart iibecause iiit iipossess iithe iifastest iiinherent iirate iiof
iiautomaticity
Initiates iia iirhythmic iiimpulse
Intrinsic iirate ii(adult): ii60-100 iibpm
Intra-atrial iiPathway ii- iiAnswers ii-Conducts iiimpulse iifrom iiSA iinode iithrough iiatrial
iimusculature iito iiAV iinode.
Consists iiof:
Anterior iitract ii(Bachmann's): iithrough iiLA
Middle iitract ii(Wenckebach's): iithrough iiRA
Posterior iitract ii(Thorel's): iithrough iiRA
Atrioventricular iiNode ii(AV iinode) ii- iiAnswers ii-Located iiin iithe iifloor iiof iiRA, iinear iithe
iitricuspid iivalve
Delays iiimpulse iifrom iiatria iibefore iiit iimoves iito iiventricles
Allows iifor iiventricular iifilling ii
Serves iias iia iiprotective iimechanism iiagainst iirapid iisuperventricular iiimpulses
Junctional iiTissue ii- iiAnswers ii-Located iiin iithe iitissue iisurrounding iithe iiAV iinode,
iiabove iithe iibifurcation iiof iithe iibundle iiof iiHIS
Serves iias iibackup iipacemaker
Intrinsic iirate ii(adult): ii40-60 iibpm
Bundle iiof iiHIS ii- iiAnswers ii-Connects iiAV iinode iito iiRight iiand iiLeft iibundle iibranches
Right iiand iiLeft iiBundle iiBranches ii- iiAnswers ii-Right iibundle iibranch iicarries iielectrical
iiimpulses iito iithe iitight iiventricle
Left iibundle iibranch iicarries iielectrical iiimpulses iito iithe iileft iiventricle.
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