What are diastolic compressive forces, Biology

Assignment Help:

Q. What are Diastolic Compressive Forces?

Coronary perfusion pressure equal to pressure gradient between the coronary arteries and the pressure in LV in diastole. When coronary perfusion pressure is lowered, diastolic blood flow decreases.

Extravascular compressive forces are greater in subendocardial than in subepicardial zones. So systolic flow is more reduced in the subendocardium than subepicardium. But there is preferential dilatation of the subendocardial vessels causing a large increase in diastolic flow in the subendocardium. This is due to increased wall stress which is 20 per cent greater than that of the subepicardial muscle. Average endocardial to epicardial flow ratio is 1.25:1 throughout the cardiac cycle.

A low subendocardial to epicardial flow occurs in epicardial coronary stenosis and heart failure. A low endocardial to epicardial flow ratio can be increased by elevation of aortic pressure


Related Discussions:- What are diastolic compressive forces

What is genetic mapping, How can the concept of recombination frequency be ...

How can the concept of recombination frequency be used in genetic mapping? Genetic mapping is the determination of the location of the genes in a chromosome. By determining

Modification of trna, Transfer RNA molecules are notable for having general...

Transfer RNA molecules are notable for having generally nucleotides shown in the figure such as 1-methylguanosine (m1G), pseudouridine   (Ψ), dihydrouridine   (D), inosine (I) and

What do you mean by neurotransmitters, Q. What do you mean by neurotransmit...

Q. What do you mean by neurotransmitters? - Nicotinic receptors (nicotine mimics the effects of Ach here). Found at NM-junction, ANS ganglions in general. Binding of Ach to

Energy, what are the types of pyramids studied

what are the types of pyramids studied

What is the menstrual cycle, What is the menstrual cycle? The menstrual...

What is the menstrual cycle? The menstrual cycle is the periodic succession of interactions among hormones and the organs of the female reproductive system that, after the star

Which glands secrete their product into circulatory system, Name of the duc...

Name of the ductless glands that secrete their product into the circulatory system are: a) Exocrine (pron: ek-seh-kren) b) Apocrine (pron: ap-eh-kren) c) Holocrine (pron:

What is satisfactory health, What is Satisfactory health The implants s...

What is Satisfactory health The implants shows history of or potential for problems though they exhibit health. The features or clinical conditions which are representative of

What is the water cycle, What is the water cycle? The water cycle repre...

What is the water cycle? The water cycle represents the circulation and recycling of water in nature. Liquid water on the planet surface is heated by the sun and turns into

What are the nine phyla of the kingdom animalia, Q Which are the beings tha...

Q Which are the beings that form the kingdom Animalia? What are the two big groups into which this kingdom is divided? The kingdom Animalia is the animal kingdom. usually the k

Explain about the commercial sterilization, Explain about the Commercial St...

Explain about the Commercial Sterilization? Sterilization is the most extreme heat treatment given in preservation of food by heat. Usually target organism is a heat resistant

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