A<unk> , or<unk>  <unk>  in the United Kingdom and other countries such as Australia and New Zealand, reflecting the British English spelling<unk> , is an alternative way to perform an echocardiogram. A specialized probe containing an ultrasound transducer at its tip is passed into the patient's esophagus. This allows image and Doppler evaluation which can be recorded. It is commonly used during cardiac surgery and is an excellent modality for assessing the aorta, although there are some limitations. It has several advantages and some disadvantages compared with a transthoracic echocardiogram (TTE).
Transesophageal echocardiogram
Ballistocardiography
Magnetocardiography
Impedance cardiography
Transthoracic echocardiogram
Phonocardiogram
Doppler echocardiography
Electrical cardiometry