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

Theoretical foundation of halsted reitan battery, Theoretical Foundation of...

Theoretical Foundation of Halsted Reitan battery There are really two theoretical bases for the Halsted Reitan battery, one contained in brain and intelligence and related writ

Explain counseling children, Counseling children Assess the child's sta...

Counseling children Assess the child's stage of development. Adjust counseling for a child's  dependency needs,  lack of  experience and  the development tasks faced by  him

Define standard titration for estimation of reducing sugar, Define Standard...

Define Standard Titration for estimation of reducing sugar by Fehling Soxhlet Method? Pipette 5 ml of Fehling's A and 5 ml of Fehling B solution into a 100 ml conical flask. Ad

What are the presumed target substrates, What are some of the presumed targ...

What are some of the presumed target substrates for cyclin-dependent kinases?

Vertebrates - osmotic and ionic regulation, Normal 0 false fa...

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

Proteins, Amino Acid - compound with an amino group and a carboxyl group a...

Amino Acid - compound with an amino group and a carboxyl group attached to a central carbon Proteins make up 50% of dry mass of cells in our bodies E.g. of proteins are

Explain the characteristics of cancer, Explain the Characteristics of Cance...

Explain the Characteristics of Cancer? The important characteristics of cancer are excessive cellular multiplication, invasiveness and autonomy. The active process of invasion

Explain the types of foods used in space, Explain the types of foods used i...

Explain the types of foods used in Space? The various types of foods are enumerated herewith. Thennostabilized (T): Heat processed foods ("off-the-shelf' items) in aluminium

Molybdenum (mo), Molybdenum (Mo) Mo is absorbed as molybdate (MOO 2- ...

Molybdenum (Mo) Mo is absorbed as molybdate (MOO 2- 4 ) ion by plants. Its uptake can be competitively reduced by SO 2- 4 . The requirement of plants for Mo is very low. Mo

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