Pathophysiology of constrictive pericarditis, Biology

Assignment Help:

Q. Pathophysiology of constrictive pericarditis?

Ans.

The thickened and rigid pericardium causes constriction of the heart and restricts ventricular dialatation and diastolic filling of the ventricles. The thickened rigid pericardium can cause dissociation of intracardiac and intrathoracic pressures and elevation of diastolic intracardiac pressures. This results in systemic and pulmonary venous congestion. Since the early phase of ventricular relaxation is normal, the early filling of the ventricles take place normally. Further relaxation of ventricles are restricted by the thickened pericardium resulting in acute elevation of diastolic ventricular pressure which gives a square root (") appearance to the diastolic ventricular pressure tracing. Uniform constriction of all the four cardiac chambers results in equalization of diastolic pressures in all the four chambers. This is different from restrictive cardiomyopathy where the difference in diastolic pressure between ventricles will be more than 5 mm. of Hg. The myocardium is usually normal in structure and function. This results in good systolic function.

The ventricular filling takes place during early filling phase only as further filling is prevented by the thickened and rigid pericardium.


Related Discussions:- Pathophysiology of constrictive pericarditis

Campylobacter infection, C ampylobacter infection C a mpylobacter ...

C ampylobacter infection C a mpylobacter jejuni is the commonest species found in poultry. These are delicate organisms that may not survive outside the host unless prot

Gonads and ovary - reproduction, Normal 0 false false false...

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

Experiment of making a rock collection, Making a rock collection A coll...

Making a rock collection A collection of the common rocks found in the community can be made by asking every pupil to bring in single piece of rock. Explain to the pupils that

What are functions of the epithelium, Q. What are some functions of the epi...

Q. What are some functions of the epithelium? The epithelial tissues can perform protection, covering and impermeability against the environment, for instance, in the skin, res

Gene constructs - transgenic animals, G e n e constructs Designing a...

G e n e constructs Designing and cloning of the gene construct is the fundamental step in the generation of transgenic animals, essentially determining success or failure of

Explain why this drug would eventualy kill a person, Dinitrophenol, DNP, wa...

Dinitrophenol, DNP, was prescribed in low doses in the 1940's to help obese patients lose weight. It's use for this purpose was discontinued when several users died. DNP makes the

Define standard or total plate counts (spc/tpc), Define Standard or Total P...

Define Standard or Total Plate Counts (SPC/TPC)? It is the most widely used method to know the microbiological quality of the food sample. It is quick and efficient method, giv

Defition of soap, what SOAP is: Subjective - The data includes informa...

what SOAP is: Subjective - The data includes information obtained from the patient or the patient's family regarding the problem. Objective dat a - the data is gathered  f

Explain the causes of steatorrhoea, Q. Explain the Causes of steatorrhoea? ...

Q. Explain the Causes of steatorrhoea? The list of possible underlying causes of steatorrhoea includes: • Malabsorption • Malabiorptian of fats in small intestine •

Biotechnology, Clonig,plasmid vectors,lambda&M13based vectors

Clonig,plasmid vectors,lambda&M13based vectors

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