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https://academic.oup.com/eurheartj/article-lookup/doi/10.1093/eurheartj/ehad193
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Transthoracic echocardiography (TTE) and transoesophageal echocardiography (TOE) are the first and key imaging techniques used to diagnose IE. Although echocardiography is widely accessible, significant variation in the use of TOE still exists.164 Three-dimensional TOE and intracardiac echocardiography have also been shown to be useful for the diagnosis of IE and its complications.165 However, the availability of intracardiac echocardiography is limited.