Download TABLE 2 DYSRHTYHMIA INTERPRETATION CHEAT SHEET Origin

TABLE 2
DYSRHTYHMIA INTERPRETATION CHEAT SHEET
(rate)
Sinus node
Origin
Dysrhythmia
Key Features
Normal sinus rhythm
Normal intervals, rate
Sinus tachycardia
Normal intervals, rate > 100
Sinus bradycardia
Normal intervals, rate < 60
Premature Atrial
Early beat with a P wave, normal QRS
contractions
Atrial flutter
F waves (sawtooth), same upside down
and right-side up, usually regular rate and
Atrial fibrillation
Irregular rate, normal QRS
Supraventricular
Same as above, may have a less sudden
Tachycardia (SVT)
onset
Premature Junctional
Early beat without a P wave or inverted P
Contractions
wave, normal QRS
Junctional Rhythm
Absent, inverted or late P waves, regular
rate 40-60/min
(PR)
Accelerated Junctional
Same as above but with rate > 60/min
Rhythm
(QRS)
Premature Ventricular
Contractions
e
Ventricl
AV node/ Junction
Atria (P wave, PR)
normal QRS
Early beat without a P wave, widened QRS
AV Node Block (P/ QRS relationship)
Idioventricular Rhythm
Regular rate 20-40/min, wide QRS
Ventricular Tachycardia
Wide QRS, rate > 140/min
Ventricular Fibrillation
Erratic activity, no discernible P or QRS
First degree heart block
Regular rate, Prolonged PR
Second degree heart
Progressively lengthening PR until and QRS
block (Type I/
is dropped, then returning to baseline PR
Wenchebach)
Second degree heart
Randomly dropped QRS’s, but consistent
block (Type II)
PR interval when QRS is present
Third degree heart block
Regular QRS with itself, and regular P
waves with themselves but no consistent
relationship to each other, rate usually
slow, and QRS usually wide
No activity
Asystole
No electrical activity (if only P waves are
present may be called ventricular
standstill)
Ventricular paced
Pacer spike before the QRS, usually wide
QRS, usually no P wave
Other
Atrioventricular paced
Two spikes, one before p wave and one
before QRS, QRS width usually normal