Click on image to view larger version.

Figure 5 Ultrasound and Electrical Stimulation

Recordings obtained by the investigational catheter positioned at a midlateral left ventricular site during (A) electrical pacing and (B) ultrasound-mediated pacing. Tracing shown from top to bottom are surface electrocardiogram (ECG) lead I, V₁, V₆, aortic blood pressure (ABP), electrical stimulation (E), and ultrasound transmission (US) marker channels.