Transesophageal echocardiography is a valuable imaging modality for the diagnosis and intraoperative assessment of discrete subaortic stenosis, overcoming some limitations of transthoracic echocardiography.
Supports TEE for discrete subaortic stenosis when TTE is limited; leaves open prospective validation before routine adoption.
Transesophageal echocardiography (TEE) is a useful technique in the diagnosis and intraoperative assessment of discrete subaortic stenosis (DSS). It allows clear visualization of the subaortic membrane, which may be missed by transthoracic echocardiography, differentiates DSS from other causes of left ventricular outflow tract obstruction, and accurately detects the presence of associated aortic regurgitation and bacterial endocarditis. Limitations in its use include inadequate visualization of the left ventricular outflow tract by TEE in the presence of a prosthetic mitral valve or mitral annular calcification, and improper alignment of the Doppler cursor across the outflow tract.
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Movsowitz et al. (1993) studied this question.
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