Rhythm Recognition
Identify the rhythm with regular P waves, consistent PR intervals, and a rate of 60-100 bpm.
what is normal sinus rhythm
Normal PR interval range
What is 0.12 to 0.20 seconds?
PR interval is longer than 0.20 seconds but consistent
What is 1st degree AV block?
Rapid, regular rhythm over 150 bpm, often with narrow QRS complexes
What is supraventricular tachycardia?
Muscle tremors or shivering often cause this EKG issue
What is somatic tremor artifact?
Rhythm with no identifiable P waves and an irregularly irregular QRS.
What is atrial fibrillation
Normal QRS duration.
What is less than 0.12 seconds?
PR interval gets longer until a QRS drops
What is 2nd degree AV block type I / Wenckebach?
Three or more consecutive PVCs
What is ventricular tachycardia?
Loose lead or cable typically results in this appearance
What is wandering baseline or interrupted tracing?
A wide, bizarre QRS occurring prematurely with no P wave
What is a premature ventricular contraction / PVC?
This interval reflects the total time of ventricular depolarization and repolarization
What is the QT interval
Sudden dropped QRS with constant PR intervals
What is 2nd degree AV block type II / Mobitz
Early beat with a P wave, followed by a normal QRS
What is a premature atrial contraction / PAC?
Electrical interference causes this pattern
What is 60-cycle interference / AC artifact?
Sawtooth flutter waves with a regular ventricular response
What is atrial flutter
This segment should be isoelectric and lies between the end of the S wave and start of the T wave
What is the ST segment
No relationship between P waves and QRS complexes
What is 3rd degree AV block / complete heart block
Rate of <40 bpm, regular rhythm, no P waves, wide QRS
What is idioventricular rhythm?
How to tell a real asystole from artifact
What is check the patient & leads, verify on another lead?
A chaotic baseline with no discernible P waves or QRS complexes
What is ventricular fibrillation
A prolonged QT interval increases the risk of this lethal rhythm and may be caused by electrolyte abnormalities.
What is torsades de pointes
This heart block is most likely to lead to pacemaker placement
What is 2nd degree type II or 3rd degree?
Atrial rate is 100–250 bpm, with 1:1 or variable conduction to ventricles
What is atrial tachycardia?
Motion artifact mimicking ventricular fibrillation is most dangerous in this situation.
What is during a code / emergency response?