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)

How does the cellular immune response take place, Q. How does the cellular ...

Q. How does the cellular immune response take place? The lymphocytes that participate in the cellular immune response are the T lymphocytes and T lymphocytes differentiate into

Complete test of hypothesis, Conduct a test of hypothesis to verify whether...

Conduct a test of hypothesis to verify whether a difference exists among the average numbers of ant species found at sites in the two regions of Mongolia. Use  .  You will require

Marine animals, Marine Animals The composition of body fluids of mari...

Marine Animals The composition of body fluids of marine invertebrates, including the ascidians are similar to seawater. Such animals need not expend much energy in regulating

Explain states of matter, Q. Explain States of matter Ans. Chemistry de...

Q. Explain States of matter Ans. Chemistry deals with the nature and composition of matter - anything that occupies space and has mass, and the changes which it undergoes. Matt

Strategic and tactic control of parasitic diseases, S t r a tegic and t...

S t r a tegic and tactic control of parasitic diseases The reduced performance of the animals in terms of decreased milk yield, draught power, breeding performance, poor bo

What is the meaning of accumulation, What is the meaning of accumulation ...

What is the meaning of accumulation The word "accumulation" is used in many of the definitions in the sense that th e horizon must have more of the material in question than i

Excreatory organ, what is the excreatory organ of silverfish?

what is the excreatory organ of silverfish?

State the term - focal seizures, State the term - Focal Seizures A foca...

State the term - Focal Seizures A focal seizure begins in one place and then spreads. As for example in a Jacksonian focal seizure, the attack begins with jerking movements in

Pennetula, Characters of pennetula

Characters of pennetula

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