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)

Define prognosis of eating disorders, Define Prognosis of Eating Disorders?...

Define Prognosis of Eating Disorders? About 50% of the patients recover fully from anorexia nervosa and achieve normal weight, 30% improve but have a partial recovery and 20% w

Can mitosis occur in haploid cells, Can mitosis occur in haploid (n) cells?...

Can mitosis occur in haploid (n) cells? And in triploid cells? The mitotic cell division can happen in haploid (n) cells, diploid (2n) cells, triploid (3n) cells, etc. Mitosis

Why are trees green, Why are trees green? It is because leaves have chl...

Why are trees green? It is because leaves have chloroplasts, which have a green pigment, which also have chlorophyll in them. They are used for conducting photosynthesis, which

Explain basic concepts of nutrition science, Explain Basic Concepts of Nutr...

Explain Basic Concepts of Nutrition Science? Food is the very basis of our life, the food we eat, though the process of digestion, we know, is converted into nutrients, and the

What about whale fins compared to fish fins, Q. Are the limbs modified into...

Q. Are the limbs modified into wings of bats and the wings of birds instance of evolutionary homology or analogy? What about whale fins compared to fish fins? Bird and Bat wing

Illustrate sulfur photosynthetic bacteria, Q. What is the molecule that don...

Q. What is the molecule that donates hydrogen for photosynthesis, in sulfur photosynthetic bacteria? In sulfur photosynthetic bacteria the substance that donates hydrogen is hy

What are other organs and tissues made from that germ layer, From which ger...

From which germ layer do the epidermis and the nervous system originate? What are other organs and tissues made from that germ layer? Epidermis and nervous system have the simi

Episode of diarrhoea, An episode of diarrhoea can be acute (recent origin) ...

An episode of diarrhoea can be acute (recent origin) or chronic (extended duration and repeated episodes) in nature. You may recall reading in the Food Microbiology ans Safety Cour

Which type of defense cell do bacteria attract, Which type of defense cell ...

Which type of defense cell do bacteria attract and cause to multiply during the inflammation process? What is the name given to the waste material produced by the inflammation trig

Determine the enzymatic chemical reactions, How does facilitated diffusion ...

How does facilitated diffusion present similarities with enzymatic chemical reactions? One of the main examples of facilitated transport is the entrance of glucose from the blo

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