Author/Editor		Tretjak, Martin
Title		Ocena funkcije levega prekata s tkivno doplersko ehokardiografijo
Translated title		The assessment of left ventricular function using tissue Doppler imaging
Type		članek
Source		In: Križman I, editor. Interna medicina 2005: novosti in aktualnosti. Zbornik predavanj 2. kongres Združenja internistov SZD; 2005 okt 21-22; Ljubljana. Ljubljana: Slovensko zdravniško društvo, Združenje internistov,
Publication year		2005
Volume		str. 187-92
Language		slo
Abstract		The assessment of left ventricular function is very important in the management of patients with the heart disease, especially those with signs and symptoms of congestive vart failure. It is often hard to assess systolic function, and assessing diastolic dysfunction is even harder, because there are no generally accepted echocardiographic criteria. Tissue Doppler imaging (TDI) enables simple and precise measurement of longitudinal mitral annulus velocities that has been shown to correlate well with left ventricular function. Typical TDI derived recording of mitral annulus velocity has one systolic (Sm) velocity and two diastolic -early (Em) and late (Am) diastolic velocity. Results. The Sm velocity has been shown to correlate well with left ventricular ejection fraction assessed by other modalities. The Sm velocity=6,4 cm/s was 91% sensitive and 95% specific for LVEF=0,45. Em velocity depends of left ventricular relaxation and reflects its diastolic function. It is preload independent. In heart failure patients it has been shown that Em velocity correlates well with the functional class and serum natriuretic peptide concentration. The Em velocity < 7 cm/s had a sensitivity of 90% and specificity of 97% for diagnosing heart failure. Conclusions. Pulsed wave tissue Doppler imaging of mitral annulus enables simple, fast and precise assessment of systolic and diastolic left ventricular function. It can replace some other more time consuming echocardiographic measurements.
Descriptors		HEART FAILURE, CONGESTIVE VENTRICULAR DYSFUNCTION, LEFT ECHOCARDIOGRAPHY, DOPPLER