Basic EKG Components
Rhythm Interpretation
ST-segment changes & ectopy
Clinical Scenarios
Treatment
100

This wave represents atrial depolarization. 

What is the P wave?

100

P wave present, rate 74, regular, narrow QRS complex

What is normal sinus rhythm? 

100

This ST-segment finding suggests acute myocardial infarction.

What is ST elevation? 

100

A patient presents with palpitations and an irregular rhythm. What is the likely rhythm?

What is atrial fibrillation? 

100

This is the treatment for symptomatic bradycardia.

What is atropine? 

200

This wave represents ventricular depolarization.

What is the QRS complex? 

200

An irregular rhythm characterized by chaotic atrial activity, rates 350-600.

What is atrial fibrillation? 

200

This ST-segment finding is commonly seen in ischemia or reciprocal changes.

What is ST-depression? 

200

A patient experiencing sudden chest pain, ST-segment depression, positive biomarkers. 

What is NSTEMI? 

200

This is the preferred treatment for stable SVT. 

What is adenosine? 

300

This interval measures the time from atrial depolarization to ventricular depolarization.

What is the PR interval? 

300

A rhythm characterized as 3+ consecutive PVC's. 

What is ventricular tachycardia?

300

These PVC's appear to come from different ventricular foci.

What are multifocal PVC's? 

300

Wide complex tachycardia at 180 bpm, dizzy, with a pulse. 

What is ventricular tachycardia?

300

This is the treatment of choice for atrial flutter. 

What is an ablation? 

400

This segment can indicate myocardial infarction if elevated.

What is the ST segment? 

400
Dysrhythmia starting in an ectopic focus above the bifurcation of the Bundle of His. 

What is supraventricular tachycardia?

400

These ectopic beats are triggered by stress, caffeine, tobacco, hypoxia, or electrolyte imbalances. 

What are premature atrial contractions? 

400

Found unresponsive, no pulse, regular electrical activity noted on the monitor. 

What is pulseless electrical activity? 

400

Treatment option for atrial fibrillation, delivers a shock on the R-wave. 

What is cardioversion? 

500

This interval represents the time for ventricular repolarization.

What is the QT interval? 

500

An irregular rhythm characterized by no measurable heart rate and ventricular quivering. 

What is ventricular fibrillation? 

500

This ectopic beat appears like a wide distorted QRS complex and occurs every third beat. 

What is ventricular trigeminy? 

500

A young athlete collapses during a game. The monitor shows polymorphic ventricular tachycardia. What is suspected? 

What is torsades de pointes? 

500

Shockable rhythms. 

What are ventricular tachycardia and ventricular fibrillation? 

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