Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. False Positive ST Changes?
1) The slope of the PQ-segment can help predict the magnitude of the influence of P-wave depolarization and thus help predict which patient would have false positive ST- segments. This sign should be worked for in leads II and III and aVF and is most commonly seen when the P-wave amplitude is increased. It is believed that this is the reason that ST depression found only in these leads is more likely to be a false positive response.
2) Digitalis: It has long been recognized that digitalis may cause ST depression and that it is exaggerated by exercise.
3) Hypokalemia: There are many causes of hypokalemia that may induce ST depression in patients with normal coronary arteries.
4) Hyperventilation: Changes in T-wave with hyperventilation or standing are relatively common and are thought to be mediated through the autonomic nervous system. When they are associated with ST-segment depression the prevalence decreases, it has been reported to be less than 1 per cent to 2 per cent. The mechanism is somewhat obscure and has been attributed to pH changes, electrolyte changes (especially potassium), and changes in heart position, coronary arteriolar vasospasm and excessive catecholamines. Because T-waves can be reduced by beta blockers and accentuated by intravenous epinephrine, the changes are probably mediated through the sympathetic pathway. When exercise induced ST-depression is found in patients who are likely to have non-coronary cause, it can be identified if the changes are abolished by a beta blocker. It has been found that the drug did not eliminate the ST depression in any patients with significant coronary artery disease, but did correct the ST in those with normal coronary angiogram.
Explain the theory of Law of Minimum This is one of the earliest hypotheses put forward by von Liebig on the relationship between the amount of plant nutrient in the soil a
What pathway does dietary iron follow in blood vessels
Bronchial asthma: Bronchial asthma is characterised by bouts of dyspnoea as a result of temporary narrowing of bronchi due to bronchial spasm, mucosal edema and thick secret
Describe a. the factors responsible for promoting lactation, and b. the mechanism responsible for the cessation of lactation when a mother weans her baby.
Maturation Phase The Maturation phase characterizes he transformation of diploid primary spermatocytes into haploid spermatids. The primary spermatocyte divides meiotically t
Bone Modeling It is a surface-specific activity (apposition or resorption) that produces a net change in the size and/or shape of a bone after initial bone formation in the emb
Define Fat requirement for cancer patients? During cancer there is enhanced mobilization of free fatty acids from adipose tissues resulting in subsequent depletion of total bod
Ethylene - Dormancy Ripening of fruits involves a chain of cellular events like: Rise in the rate of respiration, Breakdown of higher carbohydrates into carboxylic
Biochemistry : The chemistry of living organisms that covers all the chemical reactions occurring in our body.
Draw a diagram of transverse section of the spinal cord showing reflex are and label the following parts: (i) Afferent nerve fibre (ii) Grey matter (iii) Motor nerve fibre
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd