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

Animal tissue culture , Animal Tissue Culture: The term tissue culture ...

Animal Tissue Culture: The term tissue culture refers to the culture of all organs, tissue fragments and dispersed cells on a suitable nutrient medium. It may be divided into

Amoeba, Nutrition in amoeba?

Nutrition in amoeba?

Lymph, LYMPH - Lymph is a mobile connective tissue comprising lymph pla...

LYMPH - Lymph is a mobile connective tissue comprising lymph plasma (fluid) and lymphcorpuscles (cells).   COMPOSITIO N - (i )      Lymph Plasma - It is simil

What is osmotic diarrhoea, Q. What is Osmotic diarrhoea? This kind of d...

Q. What is Osmotic diarrhoea? This kind of diarrhoea is caused by the presence of osmotically active substances in the intestinal tract, which in turn, favour the drawing of la

Question 1, Which type of reproductive structure has a better chance of sur...

Which type of reproductive structure has a better chance of survival if there was a sudden temperature change in its environment? A.)asci B.)zygosporangium C.)basidium D.)lichen

Preadmission preparation - nursing, Preadmission Preparation   Preadmi...

Preadmission Preparation   Preadmission preparation is most effective when the admission is planned and there is enough time for the nurse to provide necessary information to

What do you mean by periodical, Q. What do you mean by Periodical? A pe...

Q. What do you mean by Periodical? A periodical is a publication appearing at regular intervals. Each issue is called a number and collectively these numbers comprise a volume.

Treatment and management of hypertension, Q. Treatment and Management of Hy...

Q. Treatment and Management of Hypertension? The first choice of treatment and management of primary hypertension is through behaviour modifications pertaining to food choices

Describe lifetime risk estimation, Describe Lifetime Risk Estimation ? ...

Describe Lifetime Risk Estimation ? Traditional statistical and epidemiological methods of estimating long-term risks do not accurately reflect population burden of disease. 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