[Changes in mitral and tricuspid blood flow as a function of aging. Value of a combined study with Doppler echocardiography].
The many factors, especially physiological, which influence mitral diastolic flow and the difficulties in interpretation motivated this study of age related changes of blood flow through the two atrioventricular orifices, taking tricuspid flow as the reference for evaluation of any change in mitral flow. Doppler echocardiographic studies were performed in 45 normal subjects who were divided into 3 groups according to age. The amplitude, duration and velocity time integrals (VTI) of the E and A waves were studied at the level of the valve rings and at the tips of the leaflets. Ventricular isovolumic relaxation periods were measured. The following age-related changes were observed at both atrioventricular valve orifices: increased amplitude and VTI of the A waves; decreased amplitude and VTI of the E waves, leading to a decrease or inversion of the ratios of the E/A wave amplitudes and VTI. No significant differences in the duration of the E and A waves were detected. An increase in the left ventricular isovolumic relaxation period was observed. Differences were also recorded according to the site of the Doppler sample volume: increased amplitude, duration and VTI of the E and A waves when the flow was recorded at the tips of the valve leaflets. This underlines the value of using the E wave VTI/total VTI ratio which was unaffected by the sample volume position. An age-related decrease in this ratio was demonstrated at both atrioventricular valve orifices.(ABSTRACT TRUNCATED AT 250 WORDS)
Legeais
S
S
Service de cardiologie, fondation A. de Rothschild, Paris.
Gaucher
S
S
Veyrat
C
C
Gourtchiglouian
C
C
Kalmanson
D
D
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging; D015150:Echocardiography, Doppler; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000503:physiopathology*; D015588:Observer Variation; D013318:Stroke Volume / Q000502:physiology*; D014261:Tricuspid Valve / Q000503:physiopathology*
Analyse des variations du flux mitral et tricuspidien en fonction de l'âge. Intérêt de l'étude couplée en échographie doppler.