Table 1.

Investigated ProMRI devices.

Device type	Connectora	Device models
Pulse generator
Single-chamber ICD	DF-1 or DF-4	Ilesto 5, Ilesto 7, Iforia 5, and Iforia 7 (VR-T)b
Dual-chamber ICD	DF-1 or DF-4	Ilesto 5, Ilesto 7, Iforia 5, and Iforia 7 (DR-T)b
ICD DX	DF-1	Ilesto 5, Ilesto 7, Iforia 5, and Iforia 7 (VR-T DX)b
CRT-D	DF-1 or DF-4	Ilesto 5, Ilesto 7, Iforia 5, and Iforia 7 (HF-T)b
CRT-P	—	Evia and Entovis (HF-T)b
Lead categoryc
ICD lead with DF-1	DF-1	Linoxsmart ProMRI S (65, 75)d
		Linoxsmart ProMRI SD (65/16, 65/18, 75/18)e
		fLinoxsmart ProMRI S DX (65/15, 65/17)e
ICD lead with DF-4	DF-4	gProtego ProMRI SD (65/16, 65/18, 75/18)e
		hProtego ProMRI S (65, 75)d
Solia	—	Solia S (45, 53, 60)d (atrial and ventricular leads)
Corox	—	Corox ProMRI OTW (75 BP, 85 BP)d
		Corox ProMRI OTW-L (75 BP, 85 BP)d
		Corox ProMRI OTW-S (75 BP, 85 BP)d

^aDF-4 connector (four-pole inline) is a new standard since 2010, gradually replacing the bulkier DF-1 connector (bi- or trifurcated) in ICDs/CRT-Ds¹⁷.

^bSuffix “-T” in pulse generator name indicates Biotronik Home Monitoring® function.

^cFor the primary endpoint 1, leads were grouped into these four categories. ICD and Solia leads were screw-in. Corox coronary sinus leads for CRT-D/-P devices (in addition to atrial lead and ICD or ventricular lead) have a pre-shaped distal section and are positioned by an over-the-wire or stylet-driven technique.

^dLength of the lead in cm.

^eLength of the lead in cm/ distance of proximal shock coil to lead tip in cm.

^fLead for the ICD DX.

^gPreviously labeled as Linox^smart ProMRI DF4 SD (65/16, 65/18, 75/18).

^hLead added to the study by later protocol amendments and available for European sites only.

BP: bipolar; CRT-D/-P: cardiac resynchronisation therapy defibrillator/pacemaker; DX: ICD lead allowing atrial sensing via floating dipole¹⁶; ICD: implantable cardioverter-defibrillator; MRI: magnetic resonance imaging; ProMRI: MRI-conditional.