1. A method of producing an ultrasound image, comprising: generating ultrasound; transmitting the ultrasound into a subject at a first location, wherein a first reference point of an ECG signal taken from the subject triggers the ultrasound transmission; receiving ultrasound reflected from the subject at the first location; transmitting the ultrasound into the subject at a second location, wherein a second reference point of an ECG signal taken from the subject triggers the ultrasound transmission; receiving ultrasound reflected from the subject at the second location; processing the received ultrasound to form ultrasound color traces; reconstructing the ultrasound color traces to form the ultrasound image.