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

What do you mean by somites, Q. What do you mean by somites? Somites ar...

Q. What do you mean by somites? Somites are differentiated portions of mesodermal tissue longitudinally distributed along the embryo and the somites originate the muscle portio

How is the excretory system of molluscs characterized, Q. How is the excret...

Q. How is the excretory system of molluscs characterized? Molluscs have one or two pair of spongelike nephridia, similar to kidneys

Financial accounting software, Financial Accounting Software An Ide...

Financial Accounting Software An Ideal Accounting Software should have the following features:  Purchase Details  Invoice Details  Purchase/Sale Return (Debit/Cre

Explain zidovudine, Zidovudine Zidovudine is available alone and in fix...

Zidovudine Zidovudine is available alone and in fixed-dose combinations with lamivudine as Combivir and with lamivudine and abacavir as Trizivir. It can be given in combination

What are the stages of soil, What are the Stages of soil The developmen...

What are the Stages of soil The development of soil takes place in two stages. In the first stage there is formation of parent material which is generally consolidated and cons

What is gum arabic, Gum Arabic Gum Arabic or Gum Acacia is the oldest  ...

Gum Arabic Gum Arabic or Gum Acacia is the oldest  and best known of the natural gums. Gum Arabic is the natural exudate produced by various species of the thorny Acacia trees

Describe the benefits of neuropsychological test, Describe the benefits of ...

Describe the benefits of Neuropsychological test The tests can be helpful in the assessment of: Change in mental status Abnormalities in function before abnormalitie

Planning and implementation of nursing care-aplastic anaemia, Planning of N...

Planning of Nursing Care     Administer the drugs as prescribed -    Prevent infection    Control bleeding  Implementation of Nursing Care   Administer th

What are proteins and why they are important for us, What are Proteins and ...

What are Proteins and Why they are important for us? We just read that proteins are essential for maintaining and sustaining life. What are proteins or what constitutes protein

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