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 fermented dairy products-butter, Normal 0 false false ...

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

Explain catastrophism, Catastrophism Once-popular belief which events in t...

Catastrophism Once-popular belief which events in the history of earth had occurred in the past a sudden events and by processes different from those operating today. The periods

Define determinants of food security - public nutrition, Define Determinant...

Define Determinants of Food Security - Public Nutrition? We learnt above that there is also a qualitative aspect to food security, which compels the perception of food not only

#title.how can help me solve this problem?, i have a question on how to pro...

i have a question on how to proceed the fomular of delete the gene on the human body.

What is the normal duration of the menstrual cycle, What is the normal dura...

What is the normal duration of the menstrual cycle? How does the calendar contraceptive method work? The normal duration of the menstrual cycle is 28 days but it can vary betwe

What are the biotechnological applications of enzymes, Biotechnological app...

Biotechnological applications of enzymes Although enzymes have been used in certain industrial processes for centuries, their precise role or even their identity was not known

What is the genotype of each parent cat, Long-hair in cats is due to a rece...

Long-hair in cats is due to a recessive long allele, l. Black cats are due to a recessive agouti allele, a. A short-haired tabby cat is crossed to a long-haired tabby cat, and they

Describe the intensity of s2 in second heart, Describe the Intensity of S 2...

Describe the Intensity of S 2 in second heart ? Loud A 2 occurs in patients with hypertension, when aorta is closer to anterior chest wall owing to root dilatation or TGA or

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