Ventricular septal defect (vsd), Biology

Assignment Help:

Ventricular Septal Defect (VSD) 

In ventricular septal defect there is abnormal communication between right and left ventricle. Anatomically 90 per cent of all VSD are located in  the membranous part of  the ventricular septum with a variable extension into adjoining muscular part of  the ventricular septum. Ventricular septal defect is the most common congenital cardiac lesion.  

Pathophysiology and Hemodynamics 

In ventricular septal defect there is shunting of  oxygenated blood from the left to the right ventricle as the pressure in the left ventricle is higher than in the right ventricle. This results in passage of oxygenated blood in greater amounts from left to the right ventricle, leading to pulmonary hypertension. In extreme cases there may be only one ventricle. The muscles, hypertrophy, because of  increased pressure in the right ventricle due to left to right shunt and pulmonary resistance. The muscles of  right atrium also enlarge due  to increased pressure. If pulmonary vascular resistance increases, the left to right shunt gets reduced, resulting in right to left shunt. Unoxygenated blood then crosses to the left ventricle and enters the systemic circulation. This phenomenon is known as Eisenmenger syndrome, a combination of pulmonary hypertension with reversed shunting.  


Related Discussions:- Ventricular septal defect (vsd)

Ecology, What is the role of ecology to the evolution theory.

What is the role of ecology to the evolution theory.

Nutrition affecting the growth of microorganism, Q. Can Nutrition affecting...

Q. Can Nutrition affecting the growth of microorganism? Ans. Food is food to humans and microbes - be it carbohydrates, proteins or fats. The nutritional requirements of b

Explain the types of fats, Jillian and Michael are in their freshman year a...

Jillian and Michael are in their freshman year at college. The two have been friends since grade school and the two of them enjoy getting together for dinner. Michael typically

Merits of micro propagation, Merits of Micro Propagation The special m...

Merits of Micro Propagation The special merits of micro propagation are: 1. It considerably increases the rate of multiplication 2. High rate of multiplication can be ma

Metanephridia - excretion, Normal 0 false false false E...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

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

The kidney.., where is the inlet and outlet of the diaylsis machine

where is the inlet and outlet of the diaylsis machine

Embryo and endosperm, What is the difference between embryo and endosperm?

What is the difference between embryo and endosperm?

What are the stages of soil, What are the Stages of soil The developmen...

What are the Stages of soil The development of soil takes place in two stages. In the first stage there is formation of parent material which is generally consolidated and cons

How do the products of meiosis i differ from of meiosis ii, How do the prod...

How do the products of meiosis I differ from those of meiosis II? In meiosis I, the offspring cells are haploid but every cell contains two copies of the chromosome because th

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