A Wireless Wearable Doppler Ultrasound Detects Changing Stroke Volume: Proof-of-Principle Comparison with Trans-Esophageal Echocardiography during Coronary Bypass Surgery. - Kenny JS; Clarke G; Myers M; Elfarnawany M; Eibl AM; Eibl JK; Nalla B; Atoui R (Bioengineering (Basel, Switzerland), 2021)