[Diastolic flow in the left ventricle of healthy subjects: a study using processing of intracardiac color-Doppler maps].
Aim of the study was to evaluate the left ventricular (LV) diastolic flow propagation. Ten healthy subjects (28 +/- 6 years) were examined. Two-dimensional echocardiography and color-Doppler at mitral valve were performed. A cine-loop was transferred on-line to a color image processor. Selected digitized images were stored on microdisk. LV end-diastolic, end-systolic and early filling (EF) volumes were measured. Doppler measurements across the mitral valve were obtained: peak E, peak A, E/A, the integral (VTI) of E and A, acceleration and filling time. Extension of color and time base to apex, time of EF and atrial filling (AF) were obtained by M-color, along the base-apex axis. On frames of EF and AF of 2D-color, diastolic maps were processed: surface area and pixel velocity, mean (mv) and peak (pv), were obtained of the entire color area and of 4 selected areas, 2 mm wide: 1 along the annulus-apex axis (LAx), and 3 transverse, planes, at the annulus, at papillary (1/3) and at the apex (2/3 of LAx). Three-dimensional plot and velocity distribution were obtained. Values of pixel of the entire color area were stored on microdisk and processed using a Macintosh PC. For each transverse section, 1 pixel wide, mv and pv were obtained, and data were referred to normalized axis and the mean was calculated.


RESULTS
end-diastolic volume index (EDVI): 66 +/- 7, end-systolic volume index (ESVI): 26 +/- 5 ml.(ABSTRACT TRUNCATED AT 250 WORDS)
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Cattedra di Cardiologia, Università degli Studi, Catania.
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D000328:Adult; D001783:Blood Flow Velocity; D003326:Coronary Circulation; D003971:Diastole; D004452:Echocardiography; D015150:Echocardiography, Doppler; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D015588:Observer Variation; D013599:Systole; D016277:Ventricular Function, Left
Il flusso diastolico del ventricolo sinistro nei soggetti normali: studio mediante elaborazione delle mappe color-Doppler intracardiache.