Stark S, Farshidi A, Hager W D, Donaldson M C
Pacing Clin Electrophysiol. 1985 Mar;8(2):255-60. doi: 10.1111/j.1540-8159.1985.tb05757.x.
A DDD pacemaker utilizing an atrial J electrode was implanted in a patient whose right atrial appendage had been removed 7 years prior during aortic valve replacement. Alternating QRS morphologies produced by pacemaker stimulus artifacts occurred as a consequence of atrial lead dislodgement. The screw-in atrial electrode has superior stability in patients with right atrial appendage removal; stability of the atrial J electrode cannot be obtained in such cases.