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Monday, May 10, 2010

JUGULAR VENOUS PRESSURE(J.V.P)





ASSALAMUALAIKUM...segala puji bagi Allah telah menghidupkan aku lagi hari ini..memberi nikmat mata..sihat tubuh..dan segala-galanya...SYUKURLAH!!!

ALHAMDULILLAH~

setelah lama menyepi hari ni tiba2 terasa nak menulis...

semalam aku baru baca PHYSIOLOGY...T_T



jadi..nak tulis pasai physio la kut hari ni sebab tengah dalam mode exam la ni...^_^



JUGULAR VENOUS PULSE(J.V.P)


Def: it is a record of pressure changes that occur in jugular veins
transmitted from the rigth atrium
during cardiac cycle.


Recorded by: Phlebograph


Composed: Each cycle has

3(+ve) waves-a,c,v(look at the graph above)

2(-ve) waves-x and y



a wave- caused by:transient rise of jugular pressure
due to :atrial systole
leads to :contraction of circular muscle sleeve surrounding opening of venae cavae.
mechanism : this events prevent venous blood flow from the jugular veins to the rigth
atrium
leading to accumulation of blood and thus pressure rises producing a-wave

the descending limb: due to relaxation of muscle sleeve during atrial diastole
leads to rush of accumulated blood from venae cavae and jugular
veins to rigth atrium.



c wave- due to : bulging of closed tricuspid valve into rigth atrium at the start of ventricular
systole.(ISOMETRIC CONTRACTION PHASE)
lead to: rise rigth atrial pressure.
caused: rise pressure in venae cavae and jugular veins producing c wave.



x wave- due to : downward displacement of AV ring during MAX.EJECTION PHASE.
caused: atrial capacity increase,
lead to : decrease pressure in Rt atrium and jugular veins.



v wave- due to : accumulation of venous return in Rt atrium, during closed of AV valve.
(late part of VENTRICULAR SYSTOLE and early part of DIASTOLE)
caused: upward displacement of AV ring to its original site.
lead to: increase pressure Rt atrium, jugular veins and venae cavae.




y wave- due to : rapid flow of accumulated blood from Rt atrium into Rt ventricle after opening
of AV valve at the end of ISOMETRIC RELAXATION PHASE.
lead to : decreased pressure in Rt atrium and jugular veins.



CLINICAL SIGNIFICANCE OF J.V.P.

variations in shape of jugular venous pulse waves are helpful in diagnosis of some cardiac disorders:




1.HUGE a-waves

a.during tricuspid stenosis
due to-high resistence of blood flow from Rt atrium to ventricle during atrial systole.

mechanism- during atrial systole, Rt atrium contracts against higth resistence in Rt ventricle causing high atrial pressure and a huge strong a wave.

b.during pulmonary hypertension
due to- increase intraventricular pressure



2.CANNON waves


during VENTRICULAR EXTRASYSTOLE, COMPLETE HEART BLOCK
huge wave created by overlap of a and c waves
occur when both Rt atrium and Rt ventricle contracts at the same time.



3.In HEART BLOCK

a.1st degree AV block
a-c interval prolonged, >0.2s

b.2nd degree AV block
a-wave more than number c-v waves
ratio 2:1 or 3:1


c. 3rd degree AV block
cannon waves appear..













Dalam Melangakah Terkadang Diri d ujI Dengan Ujian Yg terasa Berat HinGGa dri Terduduk&menaNgis..Perit Terasa tP KetahuiLAh&RenungilaH KembaLi ke Dalam dri....MungKin Dia HadirKan air MaTa Tika itu UTk menJahiT KemBali SejaDah iMan yg Kian TerKoyak LanTAraN Ada LanGkaH2 yg TerSasaR dr KeikHlasn..SeEMOga dri d TetapKan iman..D Setiap KepayahAn ada KemanisAn..^_^

7 comments:

Akmal Hayat said...

ok, wave tu ada dua. moving wave dengan stationary wave.

moving wave then tbhagi pada 2, transverse and longitudinal.

stationary wave terbahagi kepada tiga. string, closed pipe ngan open pipe..

^_^

fizik fizik fizik

ﺷﻬﻤﻲ @ iBnU SuRaiNi said...

huhuh...
jelez lak aku tengok member2 aku yang dah start blajar ilmu2 medic ni~
aku dok matrik tak abih2 lagi...

@akmal hayat

fizik dah abih dah bang oii~

bio bio bio~

Akmal Hayat said...

> syahmi

haha..fizik xkan habis..suma application dlm bumi ni berkait dengan fizik.. :P

DEVOTEE said...

salam

selamat menghadapi imtihan..

semoga berjaya, doa kat aku noh.


~

albanaT said...

>akmal hayat dengan syahmi..

oit...kome bedua bkn kah exm skang??

ooo...berani2 kome dtg blog ni tgh2 exm no...

akmal hayat>mmg cekang la dianih..dr dlu gi...jeles aku..aku nk tere math2 gak..

syahmi>xpa oit..2 taun exprience lg baguih..nnti ang ingt skit ilmu ang tue,...bla jd medical student..GEMPAK RESULT!!..insya-Allah...

walau pa pn...aku ttp meyokong syahmi sbgi medical student..!!=)

akmal hayat men dgn mesin..rosak pn xkesah...tp kita ni ha..men dgn badn manusia..klu rosak..naya...T_T

kn syahmi..hehe..

tp..semua nya ILMU ALLAH..DIA MAHA AGUNG MAHA BIJAKSANA>>kita ni sapalah..

ok..GUD LUK TUK kome bedua..doakn ku skali...=)

albanaT said...

>nasir..

aik..bukn ang pn exm ka??..jat kata azhar exm la ni..pa pn..syukron..insya-Allah..doakn aku gak..km semua disini..^_^

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