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PRN Education · No. 006 · POCUS Series

Bedside TTE:
The Five Views.

POCUS echo isn't a formal echocardiogram — it's five views answering five questions: How's the squeeze? Is there fluid around the heart? Is the RV blown out? How full is the tank? Is a valve grossly wrong?

Learn the views in order. Every advanced cardiac application — including Echo for PE (No. 003) — is built on these windows.

Source

Curated from the POCUS 101 Cardiac Ultrasound (Echocardiography) Made Easy: Step-By-Step Guide. Their view-by-view probe photos and labeled loops are the fastest way to build the mental model.

When to scan

The undifferentiated patient's exam

Reach for the probe

  • Hypotension or shock — pump, tank, or obstruction?
  • Dyspnea: failing LV vs. everything else
  • Chest pain with an abnormal ECG: wall motion, effusion, dissection clues
  • Cardiac arrest: organized activity vs. standstill, and the reversible causes
  • Pre-intubation hemodynamic screen in the crashing patient

Stay in your lane

  • POCUS echo is qualitative and focused. Formal echo quantifies — regional wall motion scoring, valve gradients, diastology.
  • "Grossly normal" is a legitimate POCUS answer; "normal echocardiogram" is not.
  • One bad view is not an exam. If a window fails, move to the next — the five views back each other up.

Setup

Cardiac preset changes the rules

Probe

Phased array

Small footprint fits between ribs. Cardiac preset — and note the screen indicator flips to the right side in cardiac mode.

Ergonomics

Machine on the right

Stand on the patient's right when possible: right hand drives the probe, left hand works the machine. Hold the probe like a pencil, hand anchored on the chest.

Position

Supine → LLD

Left lateral decubitus swings the heart against the chest wall and clears lung out of the way — it rescues difficult parasternal and apical windows.

The five views

Same order, every patient
1 2 3 4 1 · Parasternal (PLAX / PSAX) 3rd–5th ICS, left sternal border 2 · Apical 4-chamber PMI / inframammary fold 3 · Subxiphoid under xiphoid, aim to left shoulder 4 · IVC rotate sagittal, trace to the RA THE FOUR WINDOWS · ANTERIOR VIEW
Fig. 1 — Probe positions for the core cardiac views. Shaded area: approximate cardiac silhouette.

Parasternal long axis (PLAX)

3rd–5th intercostal space at the left sternal border · indicator to the right shoulder

Your orientation view: RV in the near field, then LV, mitral valve, LA, and the aortic outflow in one plane. The descending aorta sits behind the LA — a key landmark for effusion vs. pleural fluid.

Best view for: gestalt LV function (do the walls thicken and does the mitral anterior leaflet nearly touch the septum?), pericardial effusion, gross aortic root pathology.

Parasternal short axis (PSAX)

From PLAX, rotate ~90° clockwise · indicator toward the left shoulder · papillary muscle level

The LV in cross-section: a symmetric ring squeezing concentrically around its cavity, with both papillary muscles in view. Tilt the probe to sweep from base (mitral "fish mouth") to apex.

Best view for: global squeeze at a glance, septal flattening / D-sign (RV pressure), and gross regional wall motion.

Apical 4-chamber (A4C)

Probe at the PMI / inframammary fold · aim toward the right shoulder · indicator toward the patient's left

All four chambers side by side. This is the view for chamber comparison: the RV should be roughly 60% the size of the LV and the apex should belong to the LV.

Best view for: RV:LV ratio, TAPSE, McConnell's, valve gestalt with color. Struggling? LLD position almost always rescues this window.

Subxiphoid 4-chamber

Probe flat under the xiphoid, aimed up to the left shoulder · liver as the window

The view that works when the chest doesn't: COPD, mechanical ventilation, CPR pulse checks. The RV is the closest chamber to the probe — and the first place tamponade shows itself.

Best view for: effusion and tamponade physiology (RV diastolic collapse), cardiac activity in arrest, and imaging around chest dressings and compressions.

IVC

From subxiphoid, rotate sagittal · trace the IVC into the RA · measure ~2 cm from the junction

Size plus respiratory collapse gives you a rough CVP read: small and collapsing suggests an empty tank, fat and fixed suggests a full (or obstructed) one.

  • ≤2.1 cm and >50% collapse → low right atrial pressure
  • >2.1 cm and <50% collapse → high right atrial pressure
  • Confirm the vessel enters the RA — the aorta is the classic impostor

The five questions

What this exam actually answers
QuestionWhereQuick criteria
Squeeze?PLAX, PSAXGestalt: hyperdynamic / normal / reduced / severely reduced. EPSS <7 mm supports normal EF; walls should visibly thicken
Effusion?PLAX, subxiphoidAnechoic stripe around the heart. Tamponade = effusion + RV diastolic collapse + plethoric IVC — a clinical + echo diagnosis
RV blown out?A4C, PSAXRV ≥ LV, D-sign, TAPSE <17 mm — full workup in No. 003
Tank status?IVCSize + collapse as above; trend it, don't worship a single still
Valves grossly wrong?PLAX, A4C + colorFlail leaflet, massive regurgitant jet, heavily calcified immobile AV. Subtle disease is formal echo's job

Pearls & pitfalls

Where this scan goes wrong
Pearl

Rib space, not force

A bad parasternal window is usually one rib space too high or too low, not insufficient pressure. Slide, don't press. Then try LLD.

Pitfall

Pericardial vs. pleural fluid

In PLAX, pericardial effusion tracks anterior to the descending aorta; pleural effusion runs posterior to it. One gets a pericardiocentesis consult, the other a pigtail conversation.

Pitfall

Epicardial fat pad panic

An isolated anterior hypoechoic stripe that moves with the heart and contains speckles is usually fat, not effusion. True effusions are usually circumferential or dependent first.

Pearl

EPSS is your training-wheels EF

In PLAX, if the mitral valve's anterior leaflet nearly slaps the septum each beat (E-point septal separation <7 mm), the EF is probably fine. Big gap, bad pump — caveats for MS and AI.

Pitfall

Foreshortening the apex

An A4C obtained one space too high slices the ventricle obliquely: fake small LV, fake big RV, fake wall motion. Find the true apex before trusting anything the view tells you.

Pearl

In arrest, subxiphoid owns the pulse check

Ten seconds, probe already in place before compressions pause, record the loop, resume. Review the clip while CPR continues — don't let the ultrasound stretch the pause.

Sample Epic documentation

Copy · edit · attest

A starting template for the POCUS note. Text in brackets [ ] and pick-lists in { } are fields to complete. Save it as a SmartPhrase, then edit every field to match the actual study.

.pocusEcho
POINT-OF-CARE ULTRASOUND: FOCUSED CARDIAC (TTE)

Indication: {hypotension : dyspnea : chest pain : arrest} [***]
Exam type: Focused / limited, bedside
Operator: @ME@   Interpretation: independent, real-time
Probe: phased array
Views: {PLAX : PSAX : apical 4 : subxiphoid : IVC}

FINDINGS
- LV function (visual): {hyperdynamic : normal : mildly reduced : severely reduced}
- Pericardial effusion: {none : present, tamponade {no : yes}}
- RV size: {normal : enlarged}
- IVC: {flat, collapsing : normal : plethoric}
- Gross valve abnormality: {none : ***}

IMAGE QUALITY: adequate / limited by [***]
Images saved and archived to [PACS / Qpath / ***].

IMPRESSION: [***]. Focused study; not a comprehensive echocardiogram.

I personally performed and interpreted this study.
Electronically signed: @ME@  @TD@ @NOW@

Sample template only — not a validated institutional SmartPhrase. Verify wording, image-archival, and attestation requirements against your department's POCUS credentialing, coding, and compliance policies before clinical use. Documentation supports, but does not replace, the medical record and QA workflow.

PRN Education · POCUS Series

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