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.Normal Sinus Rhythm with Sinus Pause (arrest)/NSR with pause (arrest)

regular except time of pause; <101 bpm; normal except for a dropped P wave & QRS complex (beat)

Normal Sinus Rhythm/NSR/SR (originated in sinus node).

regular; 60 - 100 bpm; rhythm the heart should be in

Ventricular Fibrillation/VFib/VF.

irregular; no rate; no measureable P waves or QRS complexes; LETHAL!!

Ventricular Tachycardia/VTach/VT

regular; 140 - 250 bpm; no P waves; QRS complexes wide; "sharktooth" or "fireman's hat" rhythm; LETHAL!!

Sinus Rhythm with Premature Ventricular Contractions/SR with PVC's

underlying rhythm regular with irregular PVC's; rate = underlying rhythm; no P waves when a PVC occurs; PVC has wide, jagged complex

Sinus Bradycardia/Sinus Brady/SB

regular rhythm; 40 - 59 bpm; normal except too slow

Sinus Tachycardia/Sinus Tach/ST

regular rhythm; 101 - 180 bpm; normal except too fast

Atrial Fibrillation/AFib.

irregular rhythm; beats not same distance apart; 60 - 100 bpm =controlled; <60 or >100 bpm = uncontrolled; no measureable P waves

Atrial Flutter/AFlutter

regular OR irregular; 6 - 100 bpm = controlled; <60 or >100 bpm = uncontrolled; multiple "sawtooth" P waves; cousin to AFib

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