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