Explain venous pulsation, Biology

Assignment Help:

Explain venous pulsation?

Venous Pulsation: Normally the jugular venous pulsation faithfully reflects the pressure changes in right atrium. It is described as a, x, c, x, v, y, x and x and y being descent and a and v are waves. The 'a' wave is products by atrial contraction and as atrial relaxation sets in x descent begins which is interrupted by a small 'c' wave and further descent occurs due to downward displacement of atrioventricular ring and termed as x descent to differentiate it from x descent caused by atrial relxation. The 'c' wave is produced in atrium by the closure of atrioventricular valve but in JVP in neck it is an artifact resulting from systolic thrust of carotid artery, hence named as 'c' by Mckenzie. As the ventricular contraction continues the a-v valve remains closed and venous returns continues producing another slow undwelling wave called 'v' wave. At the diastole sets in the a-v valve opens producing 'y' descent until diastesis, i.e, equalisation of pressure in atrium and ventricle occurs to be followed by atrial contraction to produce 'a' wave of another cardiac cycle. The x descent is normally brisk and easy to identify in JVP. Similarly 'a' wave is brisk event, as caused by active atrial contraction and 'v' is a slow filling wave. In case of difficulty it can be timed with contralateral carotid arlery palpation, 'a' always occurs before carotid pulsation while 'v' wave appears after this.

1476_1319_f1.gif

Figure (a): Measurement of the Figure jugular venous pulse

39_JVPGraph.gif

(b): JVP waveforms


Related Discussions:- Explain venous pulsation

Explain about the simple proteins, Explain about the Simple Proteins? S...

Explain about the Simple Proteins? Simple proteins are those that are made of amino acid units just joined by peptide bond. Upon hydrolysis they yield a mixture of amino acids

Define recommended dietary allowance for riboflavin (rda), Define Recommend...

Define Recommended Dietary Allowance for riboflavin (RDA)? Several nutritional and physiological factors govern riboflavin requirements. Negative nitrogen balance reduces rib

Optic vesicle, Optic vesicle We have explained earlier that the presum...

Optic vesicle We have explained earlier that the presumptive material for the optic vesicles lies in qe eye field in the anterior region of the early neural plate. Experiments

Which are the plant tissues, Which are the plant tissues responsible for th...

Which are the plant tissues responsible for the supporting of the plant? The plant supporting tissues are the collenchyma and the sclerenchyma. The collenchyma is made of li

Inotropic agents, All currently available inotropic agents act to increase ...

All currently available inotropic agents act to increase Ca 2+ for activation in both normal and failing myocardium (Hurst). The use of inotropic agents in the treatment of CHF is

Gastrulation in some animals, Gastrulation in some Animals As mentione...

Gastrulation in some Animals As mentioned before gastrulation marks the beginning of morphogenesis that is development of body form and organisation of cells in the embryo. By

Explain about hypothalamus, Explain about Hypothalamus Another importan...

Explain about Hypothalamus Another important part of brain is hypothalamus. It is very small in sie. It controls many important functions which are as follows:  Blood pre

Define the term - functional magnetic resonance imaging, Define the term - ...

Define the term - Functional magnetic resonance imaging Functional magnetic resonance imaging (fMRI) is a recent development that permits simultaneous measurements of the brain

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd