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

Problem with role of lymphatic system, Normal 0 false false ...

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

Define nutritional support management for chemotherapy, Define Nutritional ...

Define Nutritional Support Management for chemotherapy? Antiemetics are used in the treatment of chemotherapy induced nausea and vomiting. Antiemetics become absolutely necessa

Sharps-hazards in biology laboratory, SHARPS : Cuts due to careless handli...

SHARPS : Cuts due to careless handling of sharps such as sectioning razors, microtome blades etc. are probably the most common cause of injury in the biology lab. The only real re

#title., trematodes parasitic mode of feeding

trematodes parasitic mode of feeding

Explain about hyperglycemia, Q. Explain about Hyperglycemia? It is a Gr...

Q. Explain about Hyperglycemia? It is a Greek term: hyper -meaning excessive; glyc- meaning sweet; and emia- means "of the blood". It is a condition in which an excessive amoun

What is..., What is antistaphylococcal prophylaxis and pseudomonas aerugino...

What is antistaphylococcal prophylaxis and pseudomonas aeruginosa? I''m doing a project on cystic fibrosis, and I''m curious what these terms have to do with the disease. Thanks!

Are the alleles of a gene essentially originated, Are the alleles of a gene...

Are the alleles of a gene essentially originated one from the father and the other from the mother? Are there exceptions? It is natural so that alleles have come one from the m

Main manifestations of cholera, Q. What is the etiological agent and the ma...

Q. What is the etiological agent and the main manifestations of cholera? The Cholera is a bacterial disease caused by the Vibrio cholerae. The disease is spread by fecal-oral r

How is the nervous system of molluscs organized, Q. How is the nervous syst...

Q. How is the nervous system of molluscs organized? Molluscs have well-developed sensory structures. It is accepted that cephalopods, like squid and octopus, have eyes with ima

Why immune response involves the activities of proteins, The immune respons...

The immune response involves the activities of proteins, cells, and the lymphatic system.

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