What do you mean by qrs changes, Biology

Assignment Help:

Q. What do you mean by QRS Changes?

The total amplitude of the QRS compared with exercise usually decreases near peak workload, as well as the T-wave amplitude, and there is a tendency towards right axis deviation. The QRS duration does not change significantly. If the stroke volume increases the T-wave may initially increase, which occurs early in exercise with moderate workloads. A decrease in R-wave is more likely to be seen immediately after the exercise period, however, rather than during it. When considering the QRS in the various leads during maximum exercise, there is a tendency towards a reduction in R-wave or S-wave amplitude; this is more marked in normal than in abnormal subjects. The decreased amplitude following a peak exercise period may be due to decrease in systolic and possibly diastolic volumes that often develop after peak cardiac output is attained.

This is termed the body effect, and found that left ventricular forces decreases stroke volume decrease and that right ventricular forces usually increase at the same time. In ischaemia, the systolic volume increases stroke volume decreases and the left ventricular R-waves any become taller.


Related Discussions:- What do you mean by qrs changes

Explain soy protein concentrates - protein concentrates, Soy Protein Concen...

Soy Protein Concentrates The Association of American Feed Control Officials, Inc. (AAFCO) specifies soy protein concentrates as follows:  "Soy Protein Concentrate is organiz

Endocrine glands - prostaglandins, PROS T AGLANDIN S (PGS) - Beca...

PROS T AGLANDIN S (PGS) - Because they were first found in semen (which is produced partly by the prostate gland), they were named prostaglandins. Prostaglandins are d

Zoology, general characteristics of phylum chordata

general characteristics of phylum chordata

Determine number of sucrose molecules in the solution, Determine number of ...

Determine number of sucrose molecules in the solution When a solid is dissolved in a volatile solvent the vapour pressure of the solution is less than the vapour pressure of th

Character of phylum annelida, what are the advanced characters of phylum an...

what are the advanced characters of phylum annelida that cannot be found in other phyla?

How vitamins & minerals work together with nutrients in food, How Vitamins ...

How Vitamins and minerals work together with nutrients in food? Vitamins and minerals work together with nutrients in food. While antioxidant vitamins E and C and beta-carotene

Nervous system - spinal nerves, SPINAL NERVES 31 Pairs. Mixed type. ...

SPINAL NERVES 31 Pairs. Mixed type. Total weight 150 gms. At the base of origin of spinal nerves gland of swammardon or calcarious ganglion is present. Composed of m

How auxins act helping the lateral growth of the stem, How auxins act helpi...

How auxins act helping the lateral (secondary) growth of the stem? The Auxins stimulate the formation of conductive vessels, phloem and xylem, promoting the thickening of the s

Malthus theory of human population growth, MA L THU S THEORY OF HUMAN PO...

MA L THU S THEORY OF HUMAN POPULATION GROWTH - Malthus put forward in 1778. 1.       Population grows in geometrical ratio, where as the means grow in arithmetical ratio.

What do you mean by ulcerative colitis, Q. What do you mean by Ulcerative C...

Q. What do you mean by Ulcerative Colitis? Let us understand clearly about ulcerative colitis by reading the following case. Varun, a 48-year-old male, had a very successful

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