Détail de la notice
Titre du Document
Doppler assessment of physiological stenosis at the bifurcation of the main pulmonary artery : a case of functional murmur in neonates
Auteur(s)
BAI-HORNG SO ; WATANABE T. ; SHIMIZU M. ; ...
Résumé
A systolic heart murmur is not infrequently recognized in healthy newborn infants, especially those with a low birth weight. This study aimed at assessing the hemodynamics at the bifurcation of the main pulmonary artery using Doppler echocardiography and to correlate the results with this murmur. The peak velocities of main pulmonary artery (MPAV) and right pulmonary artery (RPAV) were studied in 25 low-birth-weight infants who had recovered from acute stage and presented with a systolic murmur, and the ratio of RPAV/MPAV was calculated. Another compatible 25 healthy low-birth-weight infants without a murmur were enrolled as the control group. The initial MPAV values were 79.8 ± 20.7 (range 51-152) cm/s and 80.7 ± 14.2 (range 60-111) cm/s in the heart murmur group and in the control group, respectively (p > 0.05). The initial RPAV values were 193.4 ± 60.2 (range 118-388) cm/s and 99.8 ± 15.5 (range 76-132) cm/s in the heart murmur group and in the control group, respectively (p < 0.0001). The initial RPAV/MPAV ratios were 2.46 ± 0.61 (1.59-3.92) and 1.25 ± 0.14 (0.94-1.47) in the heart murmur group and in the control group, respectively (p < 0.0001). When the murmur disappeared after a period of 2-5 months, no significant differences in the last RPAV and RPAV/MPAV ratios between both groups could be found. The RPAV in the heart murmur group faded significantly to 118.7 ± 16.9 cm/s, and so did the RPAV/MPAV ratio to 1.24 ± 0.12 (p < 0.0001). A transient functional murm
Editeur
Karger
Identifiant
PMID : 8724652 ISSN : 0006-3126 CODEN : BNEOBV
Source
Biology of the neonate A. 1996, vol. 69, n° 4, pp. 243-248 [bibl. : 11 ref.]
Langue
Anglais
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