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Multifocal PVCs

PVCs that do not match each other: here one points up and one points down. Different shapes mean more than one irritable spot in the ventricle.

A 6-second EKG rhythm strip showing Multifocal PVCs.
Multifocal PVCs, 6 seconds of strip. Each small box is 0.04 seconds and each large box is 0.20 seconds.

How to identify Multifocal PVCs

Rate
That of the underlying rhythm
Rhythm
Regular, interrupted by early beats
P waves
None in front of the early beats
PR interval
Normal on the sinus beats
QRS
Early beats are wide, and they differ from each other
Clincher
PVCs of more than one shape: more than one irritable spot.

Rhythms it gets mistaken for

Treatment by certification level

Open your level. Treat the patient, not the strip.

Paramedic

Treat the cause and monitor.

  • No prophylactic antiarrhythmic for isolated ectopy, even in acute coronary syndrome. Treat the ischemia and watch the rhythm.
  • Watch for the patterns that matter: R-on-T, couplets, multiformed, frequent uniform, bigeminy.
AEMT

Pulse present and stable.

  • Oxygen only if hypoxic or short of breath, IV access, monitoring.
  • Acquire and transmit a 12-lead ECG. Interpreting it is a Paramedic skill.
  • Transport and reassess. Request a paramedic if the patient worsens.
EMT

Pulse present: assess and support.

  • Treat the patient, not the rhythm name: airway, breathing, circulation, vital signs.
  • Oxygen if the SpO2 is under 94%, the patient is short of breath, or shows signs of shock.
  • Request ALS and transport promptly. Reassess on the way.

An AED goes only on a patient who is unresponsive, not breathing and pulseless. It cannot feel a pulse, so on a patient with a pulse it can advise a shock that would do harm.

Could you pick out Multifocal PVCs on a fresh strip? See how many rhythms you can identify in one minute.

Try the 60-second rhythm challenge