Which Dysrhythmia Is Considered Life Threatening

Multiple Choice

Which dysrhythmia is considered life threatening?

A) P wave normal;atrial rate > 100;QRS complex width 0.06-0.08 second
B) P wave normal;atrial rate< 60;QRS complex width 0.08 second
C) P wave none identifiable;atrial rate disorganized activity greater 350 beats/min;QRS complex width irregular
D) P wave none;atrial rate cannot differentiate;ventricular rate 130-250 beats/min