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

Write the meaning of hypoglycemia, Q. Write the meaning of Hypoglycemia? ...

Q. Write the meaning of Hypoglycemia? Hypoglycemia is a Greek term: hypo -meaning less; glyc - means sweet; and emia - means "of the blood". It is a condition in which less th

Opium and morphine, OPIUM - Opium is milky latex obtained by incisin...

OPIUM - Opium is milky latex obtained by incising the unripe capsule of white poppy ( Papave r somniferum family paprarecea) It has eaten or smoke. Generally it

Regulation of the renal function, Q. Which are the three hormones that part...

Q. Which are the three hormones that participate in the regulation of the renal function? Antidiuretic hormone or ADH or vasopressin, atrial natriuretic factor (or ANF) and ald

What is the meaning of body composition, What is the meaning of Body compos...

What is the meaning of Body composition? It refers primarily to the distribution of muscle, fat, bone and other tissues in the body, and its measurement is often considered as

What proportion of children with down syndrome, What proportion of children...

What proportion of children with Down syndrome do you expect when women with Down syndrome have children with men who have 46 chromosomes justify your answer?

Plant responses to light-dark cycles, Plant Responses to Light-Dark Cycles ...

Plant Responses to Light-Dark Cycles Based on their requirement for day length (number of hours of light) for flowering plants have been grouped under three major categories,

Binary fission - types of asexual reproduction, Binary Fission - Types of A...

Binary Fission - Types of Asexual Reproduction Binary fission is a procedure in which an organism divides mitotically into two equal individuals which are generally identical

Toxic agents present in which food, Toxic agents present in food which inte...

Toxic agents present in food which interfere with thyroxine synthesis lead to the development of: 1. toxic goitre 2. cretinism 3. simple goitre 4. thyrotoxicosis si

Reproduction, what is the difference between anisogamy and oogamy?

what is the difference between anisogamy and oogamy?

Which statement about asexual reproduction is false, Which statement below ...

Which statement below about asexual reproduction is FALSE? a.With asexual reproduction, offspring are genetically identical to the parent. b.Asexual reproduction requires no

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