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.
Question 1. State the basic properties of light. Discuss the special features of ultra-microscopy and phase contrast microscopy 2. What are ultrasonic waves? Explain the dif
Irritability If a bright torch of light is flashed across your eyes, you close your eyes instinctively. The bright light acts as a stimulus (pl, stimuli) and closing your eyes
What is d excretory organ of the agama lizard
Purple(P) flowers are dominant and white(p) flowers are recessive. A homozygous dominant purple flower is crossed with a homozygous recessive white flower. what percentage of the o
what are some adaptations of flatworms
Explain about the Oesoplzageal Carcinoma? Management of patients with oesophageal carcinoma includes surgery, radiation and combination chemotherapy. Radiation to the lower nec
Cortex can be described as follows 1) The outer part of the organ, such as, the adrenal cortex, which produces many steroidhormones; 2) in plants, the area of the stem or root
Why Neuron A is a healthy neuron Neuron A is a healthy neuron with all the usual ion channels. When at rest with a membrane voltage of R millivolts, neuron A produces no acti
Explain about the Observation and Classification of Arthropoda? Introduction In the previous unit you have examined the representatives of artliropoda. In this unit, you wi
FUNDAMENTAL CHARACTERS OF EMBRYONIC DEVELOPMENT 1 . GAMETOGENESIS- Testes & ovaries are collectively called as gonads. Similarly sperms & ova are collectively calle
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd