In patients with severe TR, TR velocity can be significantly underestimated and cannot be used alone to exclude PH. The severity of the volume of TR is distinct from velocity and the probability of PH in this context should be determined in conjunction with other echocardiographic parameters.
Echocardiographic assessment of pulmonary hypertension: a guideline protocol from the BSE
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Echocardiographic assessment of pulmonary hypertension: a guideline protocol from the BSE
http://www.echorespract.com/content/5/3 ... l.pdf+html
Пьянков Василий Алексеевич