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

Define maternal nutrition and foetal outcome, Define Maternal Nutrition and...

Define Maternal Nutrition and Foetal Outcome? Maternal malnutrition has deleterious effects on both the mother and the offspring.  Inadequate energy intakes, iron deficiency an

Explain inotropes and vasopressors, Explain Inotropes and Vasopressors ...

Explain Inotropes and Vasopressors Persisting hemodynamic instability after correction of hypovolemia would necessitate the use of vasoactive agents. Which drug or interventio

Echocardiography, Echocardiography: LV hypertrophy can be identified using ...

Echocardiography: LV hypertrophy can be identified using M-Mode and 2 D imaging. Indications of myocardial ischemic states and systolic functions can be assessed by studying region

Restriction endonuclease, Suppose the restriction endonuclease HindIII cuts...

Suppose the restriction endonuclease HindIII cuts a6.0 kb linear piece of DNA into two fragments; an 800 bp fragment and a 5200 bp fragment..... Question: Suppose restriction

Organic chemistry and macromolecules, identify 7 speccific ways in which yo...

identify 7 speccific ways in which you can diversify carbon-containing compounds

What is alara, Question 1 Discuss the biological factors influencing ra...

Question 1 Discuss the biological factors influencing radioactivity Question 2 Explain the quality assurance of computed Tomography Question 3 Write short

Explain role of messenger the ribosomes, Q What is the role of messenger th...

Q What is the role of messenger the ribosomes and RNA for the protein synthesis? The mRNA is produced within the cellular nucleus and migrates to the cytoplasm where associated

Plant, what is comretun

what is comretun

How are glycosidic bonds formed, How are glycosidic bonds formed? The a...

How are glycosidic bonds formed? The anomeric hydroxyl group and a hydroxyl group of another sugar or some other compound can join together, splitting out water to form a glyco

What is the structural representation of a carboxyl group, What is the stru...

What is the structural representation of a carboxyl group? Carboxyl groups have a carbon attached to single hydroxyl group by a simple bond and to one oxygen by a double bond.

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