Medical devices and systems comprising medical devices are provided. The device comprises a shaft having a major lumen sized to receive a second medical device and an electroanatomical system imaging element mounted thereon. The shaft includes an inner liner and outer layer. The system comprises a medical device having a shaft and an electroanatomical system imaging element mounted thereon. The shaft has a major lumen sized to receive another device. The system further comprises an electroanatomical navigation system configured to receive signals from the electroanatomical system imaging element and to determine a position of the electroanatomical system imaging element and/or monitor electrophysiological data.
