© 2004 by European Society of Cardiology
Copyright © 2004, The European Society of Cardiology
Calculation of left ventricular flow velocity propagation from M-mode echocardiography
Hospital Clinico San Carlos, Madrid, Spain
Received 4 August 2004; .
grubira{at}wanadoo.es
* Corresponding author. Tel.: +34 91303220.
The left ventricular (LV) flow velocity propagation measured by colour M-mode Doppler (Vp) is a useful function diastolic index, with some advantages over pulsed Doppler. It might be used to differentiate a normal from a pseudonormal LV filling pattern.1,2 We have observed that the opening of the anterior leaflet of the mitral valve closely follows the propagation velocity of flow into the LV. This observation led us to assess the correlation between M-mode echo of the mitral valve and M-mode colour Doppler of the mitral valve, as an alternative method for obtaining this diastolic index.
We studied patients admitted to our coronary care unit who were in sinus rhythm, without significant valvulopathy, and with an adequate image of both M-mode echo and M-mode colour Doppler of the mitral valve through the apical window. We measured ejection fraction (EF), pulsed Doppler E and A waves, E/A ratio, deceleration time (DT), M-mode colour flow velocity propagation (Vp), and M-mode echo DE slope of the mitral valve (DE). Right heart catheterization was performed in 8 patients.
Fifty-seven patients (25% female) were included, aged 22–89 years (mean 64). The values obtained were (min, max, mean): E = 37–115, mean 71cm/s, A = 20–140, mean 70cm/s, E/A = 0.46–4.1, mean 1.2, DT=106–382ms, mean 180, EF=20–74, mean 45%, pulmonary wedge pressure=14–24, mean 18mmHg, Vp=192–628mm/s, mean 342; DE=166–780mm/s, mean 352. There was a significant correlation between Vp and DE slope (r = 0.658, p = 0.000) (Figure 1).
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We suggest that M-mode echo of the mitral valve might provide a simple alternative method to colour M-mode Doppler in the assessment of diastolic function of the left ventricle.
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- Garcia M.J., Thomas J.D., Klein A.L. New Doppler echocardiographic applications for the study of diastolic function. J Am Coll Cardiol (1998) 32:865–875.
[Abstract/Free Full Text] - Møller J.E., Søndergaard E., Seward J.B., Appleton C.P., Egstrup K. Ratio of left ventricular peak E-wave velocity to flow propagation velocity assessed by color M-mode Doppler echocardiography in first myocardial infarction: prognostic and clinical implications. J Am Coll Cardiol (2000) 35:363–370.
[Abstract/Free Full Text]
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