作者: Daniele Rovai , Antonio L’Abbate , Anthony N. Demaria
DOI: 10.1007/978-94-015-8126-4_22
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摘要: In the early years of M-mode and two-dimensional echocardiography, contrast agents were used to derive a qualitative information. Thus, injected into cardiac cavities identify specific structures [1], or intravenously detect abnormal flow direction. The main clinical applications this use detection intracardiac shunts [2, 3] tricuspid regurgitation [4, 5]. Nowadays, information is provided by Doppler intravenous are limited identification small entity (as in case patent foramen ovale [6]), extra pulmonary fistulae [7]) enhancement signal [8]. Indeed, majority current studies, quantitative regarding blood flow.