science

Parasternal heave

Parasternal heave is a science 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 Parasternal heave rather than just read about it. In short: A parasternal heave, lift, or thrust is a precordial impulse that may be felt (palpated) in patients with cardiac or respiratory disease. Precordial impulses are visible or palpable pulsations of the chest wall, which originate on the heart or the great vessels.

Key takeaways

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

Reference excerpt

A parasternal heave, lift, or thrust is a precordial impulse that may be felt (palpated) in patients with cardiac or respiratory disease. Precordial impulses are visible or palpable pulsations of the chest wall, which originate on the heart or the great vessels.

Technique A parasternal impulse may be felt when the heel of the hand is rested just to the left of the sternum with the fingers lifted slightly off the chest. Normally no impulse or a slight inward impulse is felt. The heel of the hand is lifted off the chest wall with each systole. Palpation with the fingers over the pulmonary area may reveal the palpable tap of pulmonary valve closure (palpable P2) in cases of pulmonary hypertension.

Interpretation Parasternal heave occurs during right ventricular hypertrophy (i.e. enlargement) or very rarely severe left atrial enlargement. This is due to the position of the heart within the chest: the right ventricle is most anterior (closest to the chest wall). Hypertrophy of the right side of the heart will occur when the right side of the heart chronically contracts against higher pressure. This occurs in the setting of valvular disease i.e. pulmonary valve, and in the setting of respiratory disease whereby the pressure in the pulmonary artery becomes elevated (e.g., left heart failure and fluid congestion to the right heart, chronic obstructive pulmonary disease, pulmonary hypertension). An example of a condition where parasternal heave can be felt is cor pulmonale. This impulse may also be felt in dilated right ventricular myopathy. The palpation of dilated myopathy differs in that the impulse tends to be vigorous and brief. This is in contrast with the sustained impulse of the hypertrophied right ventricle. A parasternal heave may also be felt in mitral stenosis. A left ventricular heave (or lift) suggests the possibility of aortic stenosis.

References

Worked examples

Example 1 — a first encounter with Parasternal heave

Start with the simplest possible case. Write down what Parasternal heave claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Parasternal heave 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 Parasternal heave 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 Parasternal heave

In research: Parasternal heave appears in science 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 Parasternal heave 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: Parasternal heave is common in secondary-school and first-year university syllabi. It links to neighbouring topics Symptoms and signs: Cardiac, so understanding it makes those chapters shorter.
In everyday life: Look for Parasternal heave 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 Parasternal heave in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Parasternal heave 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 Parasternal heave out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Parasternal heave in simple terms?

Why does Parasternal heave matter?

Because it connects several science 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 Parasternal heave?

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 Parasternal heave.