St depression only on recovery, Biology

Assignment Help:

Q. ST Depression only on Recovery?

Although ST depression during exercise often persists into recovery, it may not manifest until exercise has been terminated. The reasons for this are still not clear but the phenomena have been studied by several investigations. ST depression occurring in recovery only has the same significance as exercise induced ST changes.

Time Course of ST Depression

It has long been recognized that when ST depression comes on early at low workloads the degree of ischaemia is likely to be more severe. It has long been taught, when ST depression comes on at high workloads, but resolves very quickly after exercise, it constitutes a false positive ST depression. However, it has been found that significant CAD was more common than not, at least in those who were referred for angiography. As might be expected, patients with early onset, late offset ST depression usually had severe disease. Group of patients with resting ST depression increased with exercise, was found to have severe disease. It has often been stated that these patients should not be tested because the results would include a large number of false positives.

This might be true if the patients are asymptomatic, but certainly does not pertain to those who have anginal chest pain. It must be cautioned that not all patients with rapid resolution of ST depression during recovery have normal coronary arteries.


Related Discussions:- St depression only on recovery

Brodmann areas, One way that the cortex has been parcellated is based on fi...

One way that the cortex has been parcellated is based on fine-grained anatomical differences in the composition of the cortical layers: their thickness and types of neurons that ar

Analysis of genomic equivalence of nuclei, Analysis of Genomic Equivalence ...

Analysis of Genomic Equivalence of Nuclei Towards the ending of 19th century August Weismann had proposed that during cleavage the genetic determinants (later shown to be chro

Bohr effect, Bohr Effect Another important influence is the pH. Increa...

Bohr Effect Another important influence is the pH. Increase in carbon dioxide or other acids lowers the pH of plasma and shifts the dissociation curve to the right. At high ca

Describe about sex determination systems, Besides the XY system are there o...

Besides the XY system are there other sex determination systems? Some animals have a sex determination system dissimilar from the XY system. The X0 system is the sex determi

Main parts into which a neuron can be divided, Q. What are the three main p...

Q. What are the three main parts into which a neuron can be divided? What are their respective functions? The three mains parts into which a neuron can be didactically divided

Preparation of nursing care plan, Practical Points in Preparation of Nursi...

Practical Points in Preparation of Nursing Care Plan You first review the nursing diagnosis, then assign this priority or the order in which these are to be met.  Alo

Explain class adverse effects of nnrti, Class adverse effects of NNRTI ...

Class adverse effects of NNRTI All NNRTIs can cause a rash that is sometimes severe. NNRTIs are metabolized by and can affect hepatic CYP 450 isozymes; drug interactions can o

Which chemical causes tooth destruction, The bacteria that cause dental cav...

The bacteria that cause dental cavities in humans break down sugars, releasing what chemical which causes tooth destruction? a) Acids b) Bases c) Enzymes d) Monosaccha

Which is the autotrophic group responsible for production, Which is the aut...

Which is the autotrophic group responsible for the production of most part of the molecular oxygen of earth? Cyanobacteria and Algae of the phytoplankton are the organisms that

Which part of heart serves as an actuating signal, Which of the following s...

Which of the following serves as an actuating signal, or as part of an actuating signal, in a negative feedback system? A. Action potentials in sympathetic neurons that release

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