:: Volume 6, Issue 2 (Iranian south medical of journals 2004) ::
Iran South Med J 2004, 6(2): 139-143 Back to browse issues page
Physiological pulmonary branch stenosis in newborns: 2D-echocardiographic and Doppler characteristics and 4 months follow up
Amer Yazdanparast
, yazdanparast@bpums.ac.ir
Abstract:   (14625 Views)
Transient systolic murmurs in neonates and premature infants due to mild left (LPA) and right (RPA) pulmonary branch stenosis is recognized but follow up studies are lacking. A total of 32 neonates with murmur and 32 controls were evaluated echocardiographically at baseline and in four months follow up. Diameters of LPA and RPA were smaller in patients with murmur. Colour-coded Doppler showed turbulent flow in LPA and RPA in 93% of patients and flow velocities of both pulmonary branches were significantly higher than in controls. The follow up study at 4 months showed absent (23%) or decreased murmur (76%). Echocardiographically, absolute and relative diameters of LPA and RPA increased whereas the ratio of main pulmonary artery/aorta did not change suggesting accelerated growth or dilatation of the pulmonary branches. Thus, transient systolic murmurs in neonates are associated with temporary relative hypoplasia of the pulmonary branches which showed increased growth leading to disappearance of the murmur in most cases within 4 months of life.
Keywords: pulmonary artery, echocardiography, neonate, systolic murmur
Full-Text [PDF 138 kb]   (1569 Downloads)    
Type of Study: Original | Subject: General
Received: 2009/01/21 | Accepted: 2009/01/21 | Published: 2009/01/21


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Volume 6, Issue 2 (Iranian south medical of journals 2004) Back to browse issues page