摘要:Ultrasound technology has improved markedly in the past 10 to 15 years,prompting echocardiographers to extend its use in studying cardiac structure and function.New ultrasound equipmentand techniques offer superior image quality,greater accuracy,and expanding capabilities.As a result,moteand improved imaging modalities are available forevaluating cardiac anmomy,ventricular function,bloodflow velocity,and valvular diseases.Three-dimensional echocardiography offers the ability to improve andexpand the diagnostic capabilities of cardiac ultrasound.