Table 2.

Performance of LV leads connected to the RV port of CIEDS, and of RV leads connected to the LV port of CRTDs

LV leads connected to the RV port	PM/CRTP (n = 22)	ICD/CRTD (n = 15)
LV threshold (V@0.4 ms)
Baseline	0.75 [0.4‐0.8]	1 [0.7‐1.5]
FU	1.15 [0.8‐1.7]	1.38 [1‐1.5]
LV signal amplitude (mV)
Baseline	14.6 [10.7‐19.2]	11.3 [7.1‐7.8]
FU	10 [9.2‐15.7]	15.25 [9.6‐18.1]
LV impedance (ohm)
Baseline	815 [613‐966]	627 [504‐815]
FU	580 [468‐741] *	665 [585‐798]

RV leads connected to the LV port (n = 13)	Not applicable	CRTD
RV impedance (ohm) Tip‐coil
At lead switch		380 [350‐465]
FU		397 [365‐446]
SVC coil impendance (ohm)
At lead switch		59 [55‐62]
FU		60 [55‐61]
RV coil impedance (ohm)
At lead switch		46 [45‐47]
FU		46 [43‐48]
RV threshold (V@0.4 ms) Tip‐coil
At lead switch		1 [1‐1.3]
FU		1 [1‐1.3]

Abbreviations: FU, follow‐up; LV, left ventricular; RV, right ventricular; SVC, superior vena cava

^* P < 0.01.