1. A method of positioning an endovascular device in the vasculature of a body, comprising: advancing the endovascular device into the vasculature; transmitting a non-imaging ultrasound signal into the vasculature using a non-imaging ultrasound transducer on the endovascular device; receiving a reflected ultrasound signal with the non-imaging ultrasound transducer; detecting an endovascular electrogram signal with a sensor on the endovascular device; and processing the reflected ultrasound signal received by the non-imaging ultrasound transducer and the endovascular electrogram signal detected by the sensor; positioning the endovascular device based on the processing step.