21- sinus pause versus sinus arrest

sinus node dysfunction ,A summary of sinus node dysfunction, including sinus arrhythmia, SA exit block, sinus pauses, sinus arrest, sinus bradycardia, chronotropic incompetence, sick sinus syndrome, and the tachy-brady syndrome.
An abnormal cardiac rhythm that results from the failure of the sinoatrial node to conduct or produce action potentials. This leads to the intermediate pause of a cardiac cycle followed by an escape beat or the continuation of normal sinus rhythm.