Wikibooks - sonography: heartEchopediaESC – eLearning PlatformEchoVisumEchobasicsBritish Society of Echocardiography – Guidelines and ProtocolsTrans-ösophageal EchocardiographyEchocardiologyNorwegian University of Science and Technology – Strain rate imagingCanadian Society of Echocardiography – Echo& Stress CalculatorsFetal EchocardiographyGuide to Intraoperative TEE at the UWMCPIE Virtual TEE