Sinus Arrest

Rate	normal
P wave	those that are present are normal
QRS	normal
Conduction	normal
Rhythm	The basic rhythm is regular. The length of the pause is not a multiple of the sinus interval.

This may occur in individuals with healthy hearts. It may also occur with increased vagal tone, myocarditis, MI, and digitalis toxicity.

If the pause is prolonged, escape beats may occur.

The treatment of this dysrhythmia depends on the underlying cause.

If the cause is due to increased vagal tone and the patient is symptomatic, atropine may be indicated.

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Atropine should never be used to treat sinus arrest.