What is atrial extrasystoles, Biology

Assignment Help:

Q. What is Atrial Extrasystoles?

Atrial premature beats often occur at lower workloads and have little significance. As exercise increases, they usually subside and may then return during recovery. Supraventricular extrasystoles however, may be an aid in the identification of ischaemia. When the atrial extrasystolic beat has ST depression greater than the preceding sinus beat, it has been shown to be a marker for ischaemia. Michaelides and associates34 reported a sensitivity of 74 per cent and a specificity of 84 per cent for this little recognized finding. It has also been reported that the R-wave in supraventricular beats in ischaemic patients is taller than that in the normally, conducted beats. In normals, the premature "R"-wave is shorter than in the previous beat. An increased R-wave or no change in premature supraventricular beats has a sensitivity of 79 per cent and a specificity of 90 per cent in those who had exercise induced premature supraventricular contractions. When some baseline ST depression is present and the premature atrial contraction shows less deviation than the sinus beat, then ischaemia is rare. When a nodal premature beat is followed by a long pause and the following sinus beat shows accentuated ST depression, ischaemia is also likely.


Related Discussions:- What is atrial extrasystoles

Explain ventilation, Explain Ventilation, Chest Compressions? Even when...

Explain Ventilation, Chest Compressions? Even when the first three defibrillation attempts fail, the best chance of resuscitation still lies in successful defibrillation. Hence

Nutritional management for patient of alzheimer''s disease, Define Feeding ...

Define Feeding and Nutritional Management for patient of alzheimer's disease? Keeping the clinical manifestations of Alzheimer's disease in mind, treatment involves personaliz

Fossilisation, FOSSILIS A TIO N - The organisms are preserved and...

FOSSILIS A TIO N - The organisms are preserved and fossilized when they are buried in the ice, in an oil rich soil, in the lava of volcano, in swamps, in desiccated deser

Discuss in brief about human nose, Nose Nose consists of external and i...

Nose Nose consists of external and internal parts. The inner lining of the nose contains millions of small receptors. These receptors are located on the sensory hairs.

What are uses of hydrocolloids for health, Uses of Hydrocolloidsfor health ...

Uses of Hydrocolloidsfor health Hydrocolloids, together with other dietary fibres are increasingly being seen as contributing to a number of health effects. Some of the hydroco

List out points about the traditional food preservation, List out Points ab...

List out Points about the Traditional Food Preservation? 1. The traditional food preservation methods like drying, pickling, salting, smoking, canning and freezing have been wi

Explain functional property of emulsification, Explain Functional property ...

Explain Functional property of Emulsification Mode of action  Proteins stabilize fat emulsions Food system Sausages, soups, cakes, salad dressings, infant foods

Explain the term intracellular filaments, Explain the term Intracellular Fi...

Explain the term Intracellular Filaments? Intracellular Filaments : The cell contains fibrous proteins which serve to give the cell its shape and internal organization and fo

Chamaleon, how does chamaleon change its colour

how does chamaleon change its colour

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