Explain what is third heart sound s3, Biology

Assignment Help:

Explain what is Third Heart Sound S3 ?

S, is generated during the rapid filling pliase. It is a low frequency event. Mechanism of S, production: It is due to a sudden limitation of the rapidly expanding ventricle at the end of early rapid filling pliase. The continued rapid increase in blood volume in ventricle acts as a sudden distending force that causes the sound.

Physiological S2 is rarely heart in normal subjects after 30 years age. Exaggerated flow across the mitral valve as in left to right shunts (VSD, PDA) or MR can cause physiological S2. However, exaggerated flow across the tricuspid valve doesn't usually cause a RV S2. This is because RV is more compliant than LV and hence expands easily to accommodate increased blood flow, Pathological S, is associated with high LA pressure and reduced LV compliance, most commonly in cardiomyopathies. RV S3 can be heard in patients with high RA pressures and RV dilatation secondary to severe TR due to pulmonary hypertension or sudden RV out flow obstruction as in massive pulmonary embolism. S3, is best heard at apex unless RVS, which is best heard in left parasternal area or early loud.S3 due to constrictive pericarditis (Pericardial Knock), which is best, heard in left parasternal area.

 


Related Discussions:- Explain what is third heart sound s3

External events contribute to gain of heat in the body, What (a) internal, ...

What (a) internal, (b) external events contribute to gain of heat in the body?   a) Respiration in the tissues, particularly in the brain and active muscles, is the major in

Explain periimplant marginal tissues of mucosal conditions, Explain Periimp...

Explain Periimplant Marginal Tissues of Mucosal Conditions In addition to the redness and swelling of the marginal tissues, bleeding on probing (BOP), pocket formation, and sup

How to prepare a key, Q. How to Prepare a Key? Let us prepare a key by ...

Q. How to Prepare a Key? Let us prepare a key by making a choice of. characters, listing significant and insignificant characters, tabulating these characters and forming dicho

Genetics, how does the universality of the genetic code make recombinant DN...

how does the universality of the genetic code make recombinant DNA technology possible

Etiological factor of lactose intolerance, Q. Etiological factor of lactose...

Q. Etiological factor of lactose intolerance? These diseases are referred to as idiopathic (cause unknown) and though the possible mechanism suggested includes genetic factors,

Define carbohydrate metabolism of manganese, Define Carbohydrate Metabolism...

Define Carbohydrate Metabolism of manganese? Mn is required for carbohydrate metabolism. Enzymes pyruvate carboxylase and phosphoenol pyruvate carboxy kinase involved in glucon

Dietary management during myocardial infarction, Dietary management during ...

Dietary management during Myocardial Infarction? Patients who suffer from an attack of myocardial infarction are hospitalized and are usually kept under strict medical supervis

Agro-industrial by-products-non-conventional feed resources, Non-Convention...

Non-Conventional Feed Resources There are many non-traditional or non-conventional materials which are available in abundance and can form potential source of feedstuffs for f

Digestion of nucleic acids, Digestion of Nucleic Acids Several nuclease...

Digestion of Nucleic Acids Several nucleases present  in  the  pancreatic juice  like RNAase and  DNAase  digest various nucleic acids- These enzymes  are endonucleases which h

Circulatory system, Circulatio n I n  Animal Circulation is served ...

Circulatio n I n  Animal Circulation is served by a fluid as blood/ lymph that circulates through the body in a regular manner, receiving & distributing materials in the wa

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