The ENERGEN CRT-D, with the 4-SITE™ DF4 connector system is intended to make the implant procedure well organized and make the thinnest, durable high-energy devices even more compatible. The shape of the device is made condensed and it is the thinnest high?energy instrument in the world. Devices which are thinner and wider are preferred by 85% patients, than the others which are thick and narrow. The device is designed in order to increase the comfort of patient, especially when it is used with the ENERGEN CRT-D device systems. It contains RELIANCE® lead with 4?SITE, which makes the thinnest high?energy instrument in the world smaller and compact. Even if ENERGEN CRT-Ds are the world's thinnest high-energy devices, it does not compromise with the device’s longevity and quality. It is supported by the industry's major warranty covering device replacements for upto 10 years.