[Durgical](https://durgical.com/en/) › [DurgiPedia](https://durgical.com/en/durgipedia/) › [Radiology](https://durgical.com/en/radiology/) › [Ultrasound](https://durgical.com/en/radiology/areas/ultrasound/) › Focused cardiac ultrasound: effusion, function and the IVC

# Focused cardiac ultrasound: effusion, function and the IVC

- Reading

A quick bedside heart scan that answers simple questions: fluid around the heart, how well it pumps, and how full the veins are.

Updated Nov 13, 2026

## Key points

- Effusion = black rim around the heart; in front of the descending aorta = pericardial.
- Tamponade: right atrial systolic and right ventricular diastolic collapse + plethoric IVC; it is a clinical diagnosis.
- Right ventricle ≥ left ventricle or D-shaped septum = right heart strain.
- Small collapsing IVC = low right atrial pressure; wide fixed IVC = high.

## What it is

Focused cardiac ultrasound uses a phased-array probe and a few standard views to answer yes-or-no questions at the bedside, especially in shock, cardiac arrest and breathlessness: is there a pericardial effusion and is it compressing the heart, is the left ventricle pumping normally, poorly or too hard, is the right ventricle dilated, and is the inferior vena cava (IVC) small and collapsing or full and fixed. It does not replace a formal echocardiogram, which measures valves, pressures and wall motion in detail. Effusion appears as a black space around the heart; tamponade is suggested when the right-sided chambers collapse and the IVC is plethoric, but it remains a clinical diagnosis supported by the scan.

## What to check

- Views: parasternal long axis, parasternal short axis, apical four-chamber, subxiphoid four-chamber and subxiphoid IVC.
- Pericardial effusion: black space around the heart; in the parasternal long axis it lies in front of the descending aorta, a pleural effusion behind it.
- Tamponade signs: right atrial collapse in systole, right ventricular collapse in diastole (more specific) and a plethoric IVC.
- Left ventricle: estimate function by eye (hyperdynamic, normal, reduced, severely reduced); a large gap between the mitral leaflet and septum suggests poor function.
- Right ventricle larger than the left in the four-chamber view, or a D-shaped left ventricle in short axis, suggests right heart strain, as in massive pulmonary embolism.
- IVC: small and collapsing with breaths suggests low right atrial pressure; wide and barely changing suggests high pressure.

## Reading it step by step (and why)

- Phased-array probe, patient supine or turned left — a small footprint fits between ribs and the left turn brings the heart forward.
- Subxiphoid view first in arrest or trauma — it fits around chest compressions and shows effusion well.
- Look for a black rim around the heart — a pericardial effusion; anterior fat alone is grey and not circumferential.
- Check the right chambers for collapse — systolic right atrial or diastolic right ventricular collapse means the effusion is under pressure.
- Parasternal long axis: left ventricle squeeze, mitral leaflet opening, aortic root — a quick visual estimate of function.
- Parasternal short axis at the papillary muscles — the left ventricle should be round; a D shape means a pressured right ventricle.
- Apical four-chamber: compare right and left ventricle size — a right ventricle as big as or bigger than the left suggests strain.
- Subxiphoid IVC near the right atrium, watching breaths — small and collapsing suggests low filling, wide and fixed suggests high pressure.

## Common mistakes

- Calling the epicardial fat pad an effusion: fat is anterior only, grey and moves with the heart.
- Confusing a left pleural effusion with a pericardial one: use the descending aorta as the landmark.
- Judging tamponade by the size of the effusion: a small, fast effusion can cause tamponade, a large slow one may not.
- Using the IVC alone to decide on fluids: it is affected by ventilation, abdominal pressure and right heart disease.
- Foreshortened apical views make the right ventricle look larger or smaller than it is.
- Pausing chest compressions too long to scan during cardiac arrest; keep image pauses brief.

## Next step

- Effusion with shock or tamponade signs: call cardiology or the surgeon at once for ultrasound-guided pericardiocentesis or surgical drainage.
- Trauma with haemopericardium: surgical decompression, not needle drainage, is the definitive treatment; call the trauma surgeon.
- Dilated right ventricle in a patient with suspected pulmonary embolism: CT pulmonary angiography if stable; if unstable, discuss reperfusion with a senior.
- Severely reduced left ventricular function: treat as cardiogenic shock or heart failure and request a formal echocardiogram.
- Any unexpected or uncertain finding: request a comprehensive echocardiogram.

## Test yourself

Think of the answer, then tap the question to see it.

## In the parasternal long-axis view, how do you tell a pericardial effusion from a left pleural effusion?

A pericardial effusion lies in front of the descending aorta, between it and the heart; a pleural effusion extends behind the descending aorta.

## Which chamber collapse on ultrasound is the more specific sign of cardiac tamponade?

Right ventricular collapse in diastole; right atrial collapse in systole is earlier but less specific.

## What does a D-shaped left ventricle in the parasternal short axis suggest?

Right ventricular pressure or volume overload pushing the septum flat, as in massive pulmonary embolism or pulmonary hypertension.

## A shocked patient has a wide IVC that barely changes with breathing. What does it suggest?

High right atrial pressure: think of tamponade, tension pneumothorax, right heart failure or massive pulmonary embolism rather than hypovolaemia.

[Add to my cards (4)](https://durgical.app/estudiar/?add=/en/radiology/focused-cardiac-ultrasound-effusion-function-and-the-ivc/)

## Elsewhere in DurgiPedia

- [Cardiac tamponade: Beck triad and pulsus paradoxus](https://durgical.com/en/clinical-exam/cardiac-tamponade-beck-triad-and-pulsus-paradoxus/)
- [Jugular venous pressure and the venous pulse](https://durgical.com/en/clinical-exam/jugular-venous-pressure-and-the-venous-pulse/)
- [Shock: the clinical signs and the types](https://durgical.com/en/clinical-exam/shock-the-clinical-signs-and-the-types/)

## Connections

## Related 5

- [Ultrasound: echogenicity, probes, Doppler and artefacts](https://durgical.com/en/radiology/ultrasound-echogenicity-probes-doppler-and-artefacts/)
- [The FAST and eFAST exam in trauma](https://durgical.com/en/radiology/the-fast-and-efast-exam-in-trauma/)
- [Lung ultrasound: A-lines, B-lines and lung sliding](https://durgical.com/en/radiology/lung-ultrasound-a-lines-b-lines-and-lung-sliding/)
- [CT pulmonary angiography for pulmonary embolism](https://durgical.com/en/radiology/ct-pulmonary-angiography-for-pulmonary-embolism/)
- [The heart on CT and MRI: coronary CT, calcium score and cardiac MRI](https://durgical.com/en/radiology/the-heart-on-ct-and-mri-coronary-ct-calcium-score-and-cardiac-mri/)

## Related conditions 6

- [Cardiac tamponade](https://durgical.com/en/conditions/cardiac-tamponade/)
- [Acute pericarditis](https://durgical.com/en/conditions/acute-pericarditis/)
- [Heart failure](https://durgical.com/en/conditions/heart-failure/)
- [Cardiogenic shock](https://durgical.com/en/conditions/cardiogenic-shock/)
- [Pulmonary embolism](https://durgical.com/en/conditions/pulmonary-embolism/)
- [Hypovolaemic shock](https://durgical.com/en/conditions/hypovolaemic-shock/)

[← All of radiology](https://durgical.com/en/radiology/)

Educational content; it does not replace a radiologist's report and is not a clinical instruction. Each study is ordered on the patient's assessment and your institution's protocols.

Sources: [Pericardial Effusion](https://www.ncbi.nlm.nih.gov/books/NBK431089/) (StatPearls (NCBI Bookshelf), 2024); [Cardiac Tamponade](https://www.ncbi.nlm.nih.gov/books/NBK431090/) (StatPearls (NCBI Bookshelf), 2026); [Basic Concepts of Echocardiography Hemodynamics](https://www.ncbi.nlm.nih.gov/books/NBK576375/) (StatPearls (NCBI Bookshelf), 2022).

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Representative model, for educational purposes only.

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Source: https://durgical.com/en/radiology/focused-cardiac-ultrasound-effusion-function-and-the-ivc/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/radiology/focused-cardiac-ultrasound-effusion-function-and-the-ivc/