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

Define body mass index (bmi), Define Body Mass Index (BMI)? Weight for ...

Define Body Mass Index (BMI)? Weight for height as a marker of nutritional status has the advantage that it is independent of other factors that affect foetal outcome such as m

Microbiology, Bacteria, mutations, recombination, evolution, and adaption, ...

Bacteria, mutations, recombination, evolution, and adaption, how are all these related; must be written in two sentences.

Male reproductive disorders-congenital impotentia genarandi, Congenital imp...

Congenital impotentia genarandi Some bulls which are otherwise normal and healthy produce semen containing spermatozoa with specific morphological abnormalities together with

Why is colour an important characteristic of food, Q. Why is colour an impo...

Q. Why is colour an important characteristic of food? Colour is an important quality attribute in food although they do not necessarily influence their nutritional, flavour or

Skin, SKIN - Largest organ of body. It is covered by hair...

SKIN - Largest organ of body. It is covered by hairs or pelage i.e. pillifera. Study of skin is dermatology. Outermost covering of body. Skin is elastic and

Anatomy of the heart, The human heart is a cone-shaped, four-chambered musc...

The human heart is a cone-shaped, four-chambered muscular pump located in the mediastinal cavity of the thorax between the lungs and beneath the sternum, designed to ensure the cir

Secondary induction, Secondary Induction The two primary inductive ev...

Secondary Induction The two primary inductive events that we have described so far are significant in the patterning of early embryo. But there are another such signaling eve

Define cellulose, Cellulose Cellulose is found in plants as microfibr...

Cellulose Cellulose is found in plants as microfibrils (2-20 nm diameter and 100-40,000 nm long). These form the structurally strong framework in the cell walls. Cellulose is

Reproduction, Which are the larval stages of Porifera?

Which are the larval stages of Porifera?

Fertilizers and fertilizer management, Fertilizers and Fertilizer Managemen...

Fertilizers and Fertilizer Management Fertilizers, in a broad sense, include all materials that are added to soils to supply certain elements essential to the growth of plants

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