What is low gradient aortic stenosis, Biology

Assignment Help:

Q. What is Low Gradient Aortic Stenosis?

One may come across patients who have severe left ventricular dysfunction and modest gradients across aortic valve. This situation may be due to afterload mismatch in a patient with severe valvular aortic stenosis and left ventricular dysfunction or this situation can also be due to moderate aortic stenosis in a patient with intrinsically severe left ventricular muscle dysfunction. Valve area calculation or valve resistance calculations are not particularly useful in this situation with low cardiac output. Dobutamine stress echo cardiography is helpful in this situation. In a patient with intrinsic myocardial dysfunction, cardiac output, trans aortic gradient and calculated valve area - all increase. In a patient with severe aortic stenosis with afterload mismatch also dobutamine infusion would increase calculated valve area but it will still be in the range severe aortic stenosis. The latter patient may benefit from aortic replacement while the former would not.


Related Discussions:- What is low gradient aortic stenosis

Explain the failure of endodontic Treatment, Explain the Failure of Endodon...

Explain the Failure of Endodontic Treatment 1. Microorganisms are left inside the canal - Improper/inability of cleaning and shaping, - Source of infection could be: peri

Difference between an ecological niche and a habitat, What is the differenc...

What is the difference between an ecological niche and a habitat? An ecological niche is a set of peculiar activities, resources and methods that a species explores to survive

How does phosphocreatine act in the muscle contraction, How does phosphocre...

How does phosphocreatine act in the muscle contraction and relaxation? Phosphocreatine is the main means of energy storage of the muscle cells. During relaxed periods ATP mo

Define historical development of food processing, Define Historical Develop...

Define Historical Development of Food Processing? Food processing began thousands of years ago to help people keep food through the lean seasons. Several methods of preserving

Explain the nutritional and functional role of magnesium, Minerals :- Magne...

Minerals :- Magnesium    Food Source      Whole grains, nuts, legumes, green leafy vegetables Nutritional Functional role Essential nutrient: Deficiency is rare Co

Encystment – protozoan, Encystment – Protozoan Encystment is character...

Encystment – Protozoan Encystment is characteristic of the life cycle of many protozoan. The protozoan secretes a thickened envelope (cyst) around itself and becomes inactive

Define effect of protein excess during pregnancy period, Define effect of P...

Define effect of Protein excess during pregnancy period? It is not advisable to recommend protein supplements. Reports in the literature indicate that high-protein supplements

What proportion of the progeny, A fish of genotype a/a; B/b is crossed to a...

A fish of genotype a/a; B/b is crossed to a fish whose genotype is A/a; B/b. What proportion of the progeny will be heterozygous for at least one of the genes? (Assume independent

What is ridgemapping, What is Ridgemapping The patient is given local ...

What is Ridgemapping The patient is given local anesthesia by infiltration to numb both the  facial (labial/buccal) and  lingual (palatal) mucosa. Using either a sharp straigh

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