- Repeated Monitoring With Transthoracic Echocardiography and Lung Ultrasound After Cardiac Surgery: Feasibility and Impact on Diagnosis Ahmed Alsaddique, MD,* Alistair G. Royse, MD,†‡ Colin F. Royse, MD,†‡ Abdulelah Mobeirek, MD,* Fayez El Shaer, MD,* Ha