Coronary flow limiting stenoses, Biology

Assignment Help:

Coronary Vasoconstriction

1) Coronary flow limiting stenoses are caused by concentric or eccentric artherosclerotic plaques, with or without potential for local vasomotor changes. Fixed flow limiting stenoses present smooth muscle cell atrophy and/or plaque rigidity and are associated with the predictable ischaemic threshold and a stable pattern of effort related myocardial ischaemia.

Dynamic stenoses are usually eccentric, with compliant segments of the wall and preserved muscular media, and are associated with a variable ishaemic threshold.

2) Vasoconstriction at the site of stenoses may result from (1) neural vasoconstrictor stimuli, (2) impairment of vasodilator mechanisms, (3) increased response of dysfunctional vascular smooth muscle cells to vasoconstrictor stimuli, or (4) variable combination of these mechanisms.

3) In animal models, and possibly in unstable patients, the severity of stenosis may also be modulated by platelet aggregates.


Related Discussions:- Coronary flow limiting stenoses

Disorders of liver, DISORDERS OF LIVER: In the foregoing  sections and...

DISORDERS OF LIVER: In the foregoing  sections and sub-sections we have discussed about the common disorders of upper and lower gastrointestinal  tract. Now we shall discuss

What is meningitis, Q. What is meningitis? The Meningitis is the generi...

Q. What is meningitis? The Meningitis is the generic name given to inflammation of the meninges and membranes that cover the central nervous system. The Meningitis can have sev

Ecotone - nature and structure of community, Ecotone - Nature and Structure...

Ecotone - Nature and Structure of Community The zone of vegetation separating two different types of communities is called ecotone. It is also known as a transition zone. The

Functions of polysaccharides, FUNCTION S OF POLYSACCHARIDES Chitin...

FUNCTION S OF POLYSACCHARIDES Chitin is a structural component of fungal cell wall and exoskeleton of insects, crustaceans and some other arthropods. Peptidoglycan o

Describe the classification of life in diversity of life, Describe the Clas...

Describe the Classification of Life in diversity of life? There are at least 10 million different kinds of living organisms inhabiting Earth. Many different organisms have comm

Explain about the spinal trauma, Explain about the Spinal Trauma? Spina...

Explain about the Spinal Trauma? Spinal trauma or spinal cord injury, commonly clue to accidents, fills, sports injury can result in serious disabling consequences. The spinal

Type one diabetes mellitus, Q. Type one Diabetes Mellitus? Type 1 DM oc...

Q. Type one Diabetes Mellitus? Type 1 DM occurs in children and adolescents (6-14 yrs). In this disease, the body makes little or no insulin. Daily injections of insulin are ne

Role of nacl in metabolism, ROLE OF NaCl - It forms .9% of blood of ...

ROLE OF NaCl - It forms .9% of blood of mammal. It forms .7% of blood of frog. Bicarbonates of Na+ act as buffer for pH constancy. Involved in active transport of gluc

Spreading mechanisms of the disease, Talk about briefly three  of the commo...

Talk about briefly three  of the common enteric diseases caused by inadequate clean water supply and insufficient sanitation facilities. Your talk should contain the source and spr

What is choanocytes, Which one of the following statements about all the fo...

Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct? 1. Penguin is homiothermic while the remaining three are poikilothe

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