X4 CRT-D System

X4 CRT-D and ACUITYᵀᴹ X4 Quadripolar Pacing Leads

LILAC Acute Human Study Results

The LILAC study demonstrated that single placement of the novel Boston Scientific quadripolar, spiral leads allowed acceptable pacing performance with low pacing thresholds (PT) and phrenic nerve stimulation (PNS) avoidance.⁴

Unipolar Pacing Capture Threshold without PNS
(lead tip wedged, n=46)
LILAC Study chart

Studies on CRT-D Longevity

2013 Independent Study

An independent, retrospective, and first-of-its-kind study – inclusive of devices with contemporary battery technology – showed that there are discrepancies in battery longevity of CRT-D devices.3
The 4-year survival rate4 of device battery was 67% for Medtronic's devices compared to 94% for Boston Scientific's devices and 92% for St. Jude Medical's devices.
Medtronic = 416 patients, Boston Scientific = 173 patients, St. Jude = 57 patients
Learn more on The SABA Study

2014 Independent Study 

At Heart Rhythm Society’s 2014 Annual meeting, a second independent study (Johansen, et. al.) that included CRT-Ds with contemporary battery technology was released.5

This study confirmed the results of Dr. Saba’s study – Boston Scientific CRT-Ds lasting significantly longer than Medtronic CRT-Ds.

The 4-year survival rate2 of device battery was 81.1% for Medtronic's devices compared to 95.7% for Boston Scientific's devices and 93.6% for St. Jude Medical's devices.5
Medtronic = 651 patients, Boston Scientific = 136 patients, St. Jude = 1,587 patients, Biotronik = 369
Learn more on The JOHANSEN Study