biology

Parachute mitral valve

Parachute mitral valve is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Parachute mitral valve rather than just read about it. In short: Parachute mitral valve (or PMV) is a rare congenital heart disease where the mitral valve only has a single papillary muscle from which all chordae tendineae originate. It is caused by an embryologic failure of papillary muscles to divide into two normally distinct columns, giving the mitral valve orifice and chordea an irregular, parachute-like appearance.

Key takeaways

Parachute mitral valve belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Parachute mitral valve to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Parachute mitral valve from memory before moving on to harder problems.

Reference excerpt

Parachute mitral valve (or PMV) is a rare congenital heart disease where the mitral valve only has a single papillary muscle from which all chordae tendineae originate. It is caused by an embryologic failure of papillary muscles to divide into two normally distinct columns, giving the mitral valve orifice and chordea an irregular, parachute-like appearance. Due to the abnormal anatomy, there are almost always associated mitral valve disorders, and because of its abnormal embryologic origin, PMV almost always coincides in a complex of other congenital heart defects. PMV is usually identified during infancy or childhood due to its symptomatic nature, and hardly ever diagnosed during adulthood.

Clinical significance

Associated mitral valve disease As a result of the thickened and shortened chordae, there is a restriction of the inflow of blood to mitral valve annulus and subannulus causing a narrowing known as mitral stenosis which increases the pressure gradient through the valve. Also, abnormal closure of the mitral valve leaflets or mitral valve prolapse will cause the valve significantly leak during closure known as mitral valve insufficiency. Parachute mitral valve is commonly associated with other congenital heart disease. A 2004 study finds that children with PMV are 68% likely to have aortic coarctation, 54% likely to have an atrial septal defect, 46% likely to have a ventricular septal defect, and 19% likely to have left ventricular hypoplasia. Parachute mitral valve is also a part of the congenital complex of Shone's Syndrome. Unfortunately, the overall outcome of the children diagnosed with parachute mitral valve especially with the other likely multilevel left-heart diseases is only somewhat satisfactory. However, with increasingly improved technology for mitral valve reconstructions, repairs and replacements procedures, outcomes are expected to improve in the future.

References

Worked examples

Example 1 — a first encounter with Parachute mitral valve

Start with the simplest possible case. Write down what Parachute mitral valve claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Parachute mitral valve before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Parachute mitral valve ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Parachute mitral valve

In research: Parachute mitral valve appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Parachute mitral valve in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Parachute mitral valve is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cardiogenetic disorders, Cardiology, so understanding it makes those chapters shorter.
In everyday life: Look for Parachute mitral valve outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Parachute mitral valve in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Parachute mitral valve means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Parachute mitral valve out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Parachute mitral valve in simple terms?

Why does Parachute mitral valve matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Parachute mitral valve?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Parachute mitral valve.