Atrial sinus Rhythms.pdf 2026
Atrial/Sinus Rhythms
Study this set o nline at: https://www.cram.co m/flashcards/atrial-sinus-rhythms-
4617165
T hi n-wal l ed, l ow-pressure chambers Recei ve bl ood f rom the systemi c ci rcul ati on
D escri be the atri a and l ungs Conti nuous f l ow of bl ood f rom the superi or and i nf eri or vena cava i nto
the atri a “Atri al ki ck”
E arl y (premature) P waves Posi ti ve (upri ght) P waves (i n l ead I I ) that di f f er i n
H ow are PACs i denti f i ed? shape f rom si nus P waves T he earl y P wave may or may not be f ol l owed by a QRS
compl ex
Si nus rhythm i s the name gi ven to a rhythm ref l ecti ng normal el ectri cal acti vi ty
What i s si nus rhythm? I mpul se ori gi nates i n the SA node and f ol l ows the normal pathway of conducti on,
resul ti ng i n atri al and ventri cul ar depol ari zati on
Rate: 60-100 Regul ar P Waves: Uni f orm i n appearance, posi ti ve upri ght i n l ead I I ,
E CG characteri sti cs of a si nus rhythm?
one precedes each QRS compl ex - extra? PR I nterval : 0.12-0.20 QRS D urati on: 0.12
SA node to AV node and down the bundl es and ri ght bef ore ventri cul ar
What does the PR i nterval si gni f y? depol ari zati on. I f i t's above or bel ow i t's not si nus rhythm and i mpul se came f rom
somewhere el se?
I mpul se goes down both bundl es and both ventri cl es depol ari ze at the same ti me
What does QRS si gni f y? i ts l ess than 0.12 and i f i ts greater then they are not depol arzi ng together.
Somethi ng i s goi ng on wi thi n ventri cl es
What i s the normal si nus rhythm i n newborn to 3 months? 3 mo-2yrs? 2 years to 10? 85-205, 80-160 100-190, 75-160 60-140, 60-90
What age does thei r mean become more adul tl i ke? 2 but can sti l l get to 140 and be normal
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Atrial/Sinus Rhythms
Study this set o nline at: https://www.cram.co m/flashcards/atrial-sinus-rhythms-
4617165
T hi n-wal l ed, l ow-pressure chambers Recei ve bl ood f rom the systemi c ci rcul ati on
D escri be the atri a and l ungs Conti nuous f l ow of bl ood f rom the superi or and i nf eri or vena cava i nto
the atri a “Atri al ki ck”
E arl y (premature) P waves Posi ti ve (upri ght) P waves (i n l ead I I ) that di f f er i n
H ow are PACs i denti f i ed? shape f rom si nus P waves T he earl y P wave may or may not be f ol l owed by a QRS
compl ex
Si nus rhythm i s the name gi ven to a rhythm ref l ecti ng normal el ectri cal acti vi ty
What i s si nus rhythm? I mpul se ori gi nates i n the SA node and f ol l ows the normal pathway of conducti on,
resul ti ng i n atri al and ventri cul ar depol ari zati on
Rate: 60-100 Regul ar P Waves: Uni f orm i n appearance, posi ti ve upri ght i n l ead I I ,
E CG characteri sti cs of a si nus rhythm?
one precedes each QRS compl ex - extra? PR I nterval : 0.12-0.20 QRS D urati on: 0.12
SA node to AV node and down the bundl es and ri ght bef ore ventri cul ar
What does the PR i nterval si gni f y? depol ari zati on. I f i t's above or bel ow i t's not si nus rhythm and i mpul se came f rom
somewhere el se?
I mpul se goes down both bundl es and both ventri cl es depol ari ze at the same ti me
What does QRS si gni f y? i ts l ess than 0.12 and i f i ts greater then they are not depol arzi ng together.
Somethi ng i s goi ng on wi thi n ventri cl es
What i s the normal si nus rhythm i n newborn to 3 months? 3 mo-2yrs? 2 years to 10? 85-205, 80-160 100-190, 75-160 60-140, 60-90
What age does thei r mean become more adul tl i ke? 2 but can sti l l get to 140 and be normal
Page 1
