Rhythm library · 18 strips

EKG Reference

Every strip is drawn on standard paper at 25 mm/s and 10 mm/mV, so you can count boxes exactly as you would at the bedside.

Sinus

Normal Sinus Rhythm

60–100 bpm · Regular

Stable

Sinus Bradycardia

< 60 bpm (symptoms usually < 50) · Regular

Watch

Sinus Tachycardia

100–150 bpm (rarely > 220 − age) · Regular

Watch

Atrial & SVT

Atrial Fibrillation

Atrial 350–600; ventricular variable (RVR > 100) · Irregularly irregular

Watch

Atrial Flutter

Atrial ~300; ventricular 150 (2:1) or 75 (4:1) · Usually regular (variable block → irregular)

Watch

Supraventricular Tachycardia

150–250 bpm · Very regular

Watch

Wolff–Parkinson–White

Normal in sinus · Regular

Watch

Ventricular

Ventricular Tachycardia

> 100 bpm (often 150–250) · Regular (monomorphic)

Critical

Torsades de Pointes

200–250 bpm · Irregular

Critical

Heart block

1st Degree AV Block

Usually normal · Regular

Stable

2nd Degree AV Block, Mobitz I (Wenckebach)

Atrial normal; ventricular slightly slower · Regularly irregular (grouped beating)

Watch

2nd Degree AV Block, Mobitz II

Atrial normal; ventricular slower · Irregular when beats drop

Critical

3rd Degree (Complete) AV Block

Atrial 60–100; ventricular 20–40 (ventricular escape) or 40–60 (junctional) · P-P regular and R-R regular, but independent

Critical

Arrest

Ventricular Fibrillation

Not measurable · Chaotic

Critical

Asystole

0 · N/A

Critical

Pulseless Electrical Activity

Any · Any organized rhythm

Critical

Ischemia

Anterior STEMI

Variable · Usually regular

Critical

III

Inferior STEMI

Often slow (vagal, AV nodal ischemia) · Regular

Critical