Show upsloping st-segment, Biology

Assignment Help:

Q. Show Upsloping ST-Segment?

There are few subjects in exercise literature that has generated more controversy than the significance of up sloping ST-segments. The up sloping ST-segment is considered to indicate ischaemia if, at 80 msec after the J point, the segment is 1.5 mm below the baseline level of the PQ Junction. Junctional changes with very steep up sloping segments are probably not pathological.

149_Show Upsloping ST-Segment.png

The physiological basis for the observed  ECG abnormalities is complex and may be multifactorial. The magnitude of the stenosis  in an artery, estimated by angiography may not accurately predict the amount of restriction in  flow, especially when spasm may be induced by exercise. There has been general agreement however, that an increased magnitude of ST-segment depression usually denotes an increased degree of ischaemia. Ekelund reported an almost a three fold increase in cardiac events in patients with the so called strongly positive stress test (ST depression of 2 mm or more). Current criteria accept 1.5 mm of depression of 0.08 msec from the J point even if the ST-segment slopes upward.
 
Mason and associates in the study of a relation observed that reducing the depression of the ST-segment to 0.5 mm increased the sensitivity to 84 per cent but decreased the specifity to 57 per cent. They found that the ST-segments alone at maximum exercise correlated best with an increased LV filling pressure in 90 per cent of patients.

1466_Show Upsloping ST-Segment1.png


Related Discussions:- Show upsloping st-segment

Explain the genetically-modified brinjal developed for, The genetically-mod...

The genetically-modified (GM) brinjal in India has been developed for: 1. Insect-resistance 2. Enhancing shelf life 3. Enhancing mineral content 4. Drought-resistance

Explain the staphylococcus - characteristics of bacteria, Explain the Staph...

Explain the Staphylococcus - Characteristics of Bacteria? Staphylococcus - It is gram positive, nonsporulating facultative anaerobic cocci present in grape-like clusters. These

Wound botulism, Q. Wound Botulism? It is the rarest form of botulism. T...

Q. Wound Botulism? It is the rarest form of botulism. The illness results when C. botulinum by itself or with other microorganisms infects a wound and produces toxins, which re

What is human glucose transporters (glut), What is Human Glucose Transporte...

What is Human Glucose Transporters (GLUT)? All GLUTS are the integral proteins, which penetrate and span the lipid bilayer of plasma membrane. Six isomers of GLUT have been des

Calculate the insulin bolus and drip rate , Mrs. M is a 35-year-old Hispani...

Mrs. M is a 35-year-old Hispanic female with no known past medical history; does not have a primary care provider (PCP). She presents to the emergency department with the following

Define etiological risk factors in cancer - genetic factors, Define etiolog...

Define etiological risk factors in cancer - Genetic Factors? Some cancers are programmed by genes to develop. Gene mutations result from one or more regulatory genes in the cel

What is the cell theory, Q. What is the cell theory? Cell theory assert...

Q. What is the cell theory? Cell theory asserts that the cell is the element unit of living beings. Before the discovery of the cell, it was not acknowledged that living bei

Urine sugar testing, Testing for urine sugars is not recommended for either...

Testing for urine sugars is not recommended for either diagnosis or monitoring of patients with diabetes. This is because a urine sugar is not a reliable test. When no facilities a

What are cilia and flagella, Cilia and flagella are structures found in var...

Cilia and flagella are structures found in various prokaryotes as well in some eukaryotic cells. They play defense, nutrition and movement roles for the cell. In eukaryotic cells o

Essentials of Human Diseases and Conditions, How do pathological conditions...

How do pathological conditions affect homeostasis of your body?

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