Table 2: Device information and results of pre- and post-ICD interrogations.

Type of IED (%)

Pacemaker (PM)74 (63)
ICD/ICD + PM30 (25)
LVAD8 (7)
LVAD + ICD4 (3)
LVAD + PM2 (2)
Pacemaker program
DDD7 (5.9)
DDDR59 (50)
VVI15 (12.7)
VVIR22 (18.6)
DDI4 (3.4)
DDIR2 (1.7)
Missing data9 (7.6)
Pre- and postinterrogation IED results
Changes during studyNone
Inappropriate ATP None
MonitorNo arrhythmia
Inappropriate shocksNone
Inappropriate sensing None

Abbreviations: IED: implantable electromedical device; PM: pacemaker; ICD: implantable cardiac defibrillator; LVAD: left ventricular assist device; DDD: dual chamber pacemaker with pacing and sensing in atrium and ventricle; DDDR: dual chamber pacemaker that is rate responsive; VVI: pacemaker that is ventricle paced, ventricle sensed, and pacemaker inhibited in response to a sensed beat; VVIR: (most commonly placed) ventricle paced, ventricle sensed, and pacemaker inhibited in response to a sensed beat and rate responsive; DD: atrial sensing and pacing, and ventricular sensing and pacing, but the pacemaker will not track intrinsic atrial activity; DDIR: atrial sensing and pacing, and ventricular sensing and pacing, but the pacemaker will not track intrinsic atrial activity and is rate responsive; ATP: antitachycardia pacing.