RHYTHM

axis ⇢ ⇠ rate
ecg steps

Is it sinus ?

yes

QRS's are preceded by "sinus" P waves
 

"sinus" P wave is positive in lead II and biphasic in V1

(e.g. normal sinus rhythm, sinus arrhythmias)
 

no

QRS’s are not preceded by P waves or preceded by "non-sinus" P waves

either no P wave, retrograde P wave, or "non-sinus" P wave

(e.g. atrial, junctional, and ventricular arrhythmias)

Is it regular ?

regular

Rs are evenly spaced

(e.g. sinus bradycardia, atrial flutter, junctional tachycardia)

regularly irregular

Rs are not evenly spaced but follow a pattern

(e.g. Mobitz type I 2° AV block, ventricular geminy)

irregularly irregular

no recognizable Rs pattern

(e.g. atrial fibrilation, multifocal atrial tachycardia)


axis ⇢ ⇠ rate
related topics



sinus arrhythmia
atrial arrhythmia
junctional arrhythmia
ecg home page
ventricular arrhythmia
conduction system
arrhythmia