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Lesson

LVAD Emergencies: Is It Really Arrest?

12 min Cardiac & ECG Skip to quiz

Objective: Treat an LVAD patient as a device-plus-patient problem: confirm the pump is running, use MAP and mental status instead of a pulse, and follow AHA special-circumstances framing for when compressions start.

Why This Is Hard

There is no pulse, so someone starts CPR on a working pump. AHA 2025 special circumstances: durable LVAD patients may have no palpable pulse even when the device is supporting them. You need the hum, the controller alarms, MAP if you can get it, and mental status. Compressions are for the truly unresponsive patient with no signs of circulation — and they can damage the inflow cannula, so the decision has to be real.

On this truck
  • Listen over the pump (left chest/upper abdomen) for a continuous hum. Ask family for the backup controller and charged batteries.
  • Pulse ox and NIBP may fail. Use waveform capnography, mental status, skin, and a MAP from an arterial line if they have one — or a Doppler/MAP estimate if your protocol includes it.
  • Contact the VAD coordinator early. That number is often on the device bag. Destination is the implanting center if time allows.

Street Sequence

  1. ABCs from the door: talking? breathing? hum? alarms?
  2. If they are awake: the missing pulse is expected. Treat the complaint (volume, arrhythmia, infection, stroke) and bring the spare controller.
  3. If unresponsive: airway, glucose, look for reversible causes. Restart/replace batteries and controller per the family’s trained steps if the pump is silent.
  4. If still lifeless with no hum and no signs of circulation: CPR per AHA LVAD framing and your protocol. Defibrillate VF/pVT if present — pads as usual, avoid the driveline.
  5. Notify the VAD center. Do not waste the scene hunting a pulse that will never be there.

Field Rules (Education)

  • No pulse is not PEA until you checked the pump. Continuous-flow LVADs often have no palpable pulse.
  • Hum + mentation = circulation until proven otherwise. A silent pump plus collapse is the emergency.
  • CPR: AHA allows chest compressions when the patient is unresponsive with no signs of circulation. It is not the first move on a talking LVAD patient.
  • Defibrillation and ACLS drugs still apply for shockable arrest. Mind the driveline. Family is your device expert on scene.
Say out loud
  • LVAD — listening for the hum
  • No pulse expected if the pump is running
  • Coordinator number / spare controller
  • CPR only if lifeless with no circulation signs

Field Pitfalls

  • Starting CPR on a talking patient because the pulse ox is blank.
  • Leaving the spare batteries on the kitchen table.
  • Calling TOR because there was never a pulse.

Practice

60-second drill

Unresponsive LVAD, family screaming, no pulse, faint hum, MAP unknown. First four actions. Then: same patient, pump silent, no breathing. What changes?

Related: PEA: Without a Pulse, High-Quality CPR.

Sources & Further Study

Named guidelines for further study. They are not clinical orders and do not replace your protocol or medical direction.

Education only. Apply learning within your protocols and medical direction. This is not clinical care guidance.

Check Your Understanding

Street decisions from this lesson only. After you check, the key is highlighted. Education practice — not a certification exam.

1. A continuous-flow LVAD patient with no palpable pulse who is talking:
2. The first device check on an LVAD emergency is:
3. Chest compressions in LVAD arrest are framed by AHA as:
4. VF in an LVAD patient:
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