A case of atrial standstill with the atrial lead of a dual-chamber pacemaker implanted in the coronary sinus

Key Teaching Points•Atrial standstill is a rare clinical condition characterized by absence of electrical and mechanical atrial activity, and the spatial distribution of atrial lesion can be diffuse or partial.•In atrial standstill when pacemaker implantations are thought to be necessary, evaluation by electrophysiological study should be considered before implantation.•Atrial standstill is a progressive disease; therefore, atrial pacing failure might occur. Patients implanted with a pacemaker should be followed up carefully. •Atrial standstill is a rare clinical condition characterized by absence of electrical and mechanical atrial activity, and the spatial distribution of atrial lesion can be diffuse or partial.•In atrial standstill when pacemaker implantations are thought to be necessary, evaluation by electrophysiological study should be considered before implantation.•Atrial standstill is a progressive disease; therefore, atrial pacing failure might occur. Patients implanted with a pacemaker should be followed up carefully.