Rhythm ID
Emergency or Not?
EKG Basics
Clinical Scenarios
100

This rhythm has a rate of 60–100 bpm with a P wave before every QRS.

What is Normal Sinus Rhythm?

100

This rhythm is normal and does NOT require intervention.

What is Normal Sinus Rhythm? 

100

This wave represents atrial depolarization.

What is the P Wave? 

100

Patient dizzy, HR 48 bpm. Medical term for their HR. 

What is Sinus Bradycardia? 

200

This rhythm is irregularly irregular with no visible P waves.

What is Atrial Fibrillation?

200

This slow rhythm may be normal in athletes but concerning if symptomatic.

What is Sinus Bradycardia? 

200

This complex represents ventricular depolarization.

What is the QRS Complex? 

200

Patient anxious, HR 120 bpm, regular. Medical term for their HR. 

What is Sinus Tachycardia

300

This rhythm has a rate >100 bpm but is still regular with P waves.

What is Sinus Tachycardia?

300

This rhythm increases stroke risk and must be reported.

What is Atrial Fibrillation? 

300

This wave represents ventricular repolarization.

What is the T Wave? 

300

Patient has palpitations, irregular rhythm. What could be the cause? 

What is Atrial Fibrillation? 

400

This rhythm shows wide QRS complexes and a very fast rate.

What is Ventricular Tachycardia?

400

This rhythm requires immediate CPR and no shock.

What is Asystole? 

400

This interval measures time from atria to ventricles.

What is the PR interval? 

400

Patient collapses, no pulse, chaotic rhythm. What could be the cause? 

What is Ventricular Fibrillation? 

500

This rhythm is completely chaotic with no identifiable waves.

What is Ventricular Fibrillation?

500

This rhythm requires immediate defibrillation.

What is Ventricular Fibrillation? 

500

This is the normal heart rate range for adults.

What is 60-100 bpm? 

500

Patient unresponsive, flatline on monitor. What is the cause? 

What is Asystole? 

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