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

Explain the advantages and disadvantages of insulin pen, Advantages of Insu...

Advantages of Insulin Pen - More convenient and easier to transport than traditional vial and syringe. - More accurate doses. - Easier to use for those with visual or fin

Various definitions of species, In biology, a species is smallest and basic...

In biology, a species is smallest and basic unit of classification. Each species is placed within a single genus. For example biological name of human being is homosapiens. Here ho

Nursing management of myocarditis, Nursing Management Propped up po...

Nursing Management Propped up position.  Monitor signs and symptoms and laboratory test results documenting myocarditis.  Monitor adequacy of cardiac output and hemo

Define maternal dietary intake and foetal outcome, Define Maternal Dietary ...

Define Maternal Dietary Intake and Foetal Outcome? Among the various nutrients, energy intake appears to be the most crucial, for developing countries. Studies from India have

What is the inner life of the genome, For the article entitled "The inner l...

For the article entitled "The inner life of the genome" which of the following is true? A. Individual chromosomes occupy explained territories within the nucleus. B. The spe

Phylum annelida, PHYLUM ANNELIDA Definition  and Introduction Bila...

PHYLUM ANNELIDA Definition  and Introduction Bilateral and  protosomial  eucoelomate  eumetazoans  whose  long   narrow and  wormlike body  is division  into  ring like  t

Define about aliphatic alcohols - non glyceride fractions, Define about Ali...

Define about Aliphatic alcohols - Non Glyceride Fractions? These are water-insoluble, with their content varying from 0.5-7% of the unsaponifiable matter. Rice bran oil contain

Amylase stock solution, Assume that you have 1 mL of a solution amylase (an...

Assume that you have 1 mL of a solution amylase (an enzyme) at a concentration of 15 mg protein/mL. Calculate the volume of diluting buffer that you would have to add to 1.0 mL of

Describe the mechanism use to alleviate situation, If levels of ATP become ...

If levels of ATP become high in a cell (i.e more than the cell needs at that time), describe the mechanism that the cell would use to alleviate this situation (include the name of

Conventional agro-industrial oilseed cakes, Conventional agro-industrial oi...

Conventional agro-industrial oilseed cakes Groundnut meal: It is readily available protein source byproduct from the extraction of groundnut, which is a popular human food i

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