Improved definition of left atrial thrombus by tissue harmonic imaging

Harmonic imaging is one of the newest echocardiographic imaging techniques enabled by the recent development of newer broadband transducers used to de tect harmonic frequencies, which are multiples of the transmitted frequency . Tissue harmonic imaging is useful to improve the definition of left ventr icular endocardial borders.(1-5) We describe a case in which the technique facilitated the transthoracic diagnosis of a left atrial thrombus difficult to detect by fundamental imaging.