Coronary flow abnormalities in neonates with aortic stenosis.
Left coronary artery flow velocities in neonates were determined noninvasively with transthoracic pulsed wave Doppler ultrasonography. In normal subjects (n = 30) there was diastolic flow predominance with median (range) peak flow velocity in diastole, 23.8 cm/s (12.7 to 51.3 cm/s), and median peak flow velocity in systole, 12.7 cm/s (7.8 to 35.0 cm/s). In 3 neonates with severe aortic stenosis, retrograde left coronary flow throughout systole was observed before surgery. In these patients there was forward systolic flow 4 to 8 days after successful surgical valvulotomy was performed.
Oskarsson
G
G
Department of Pediatrics, Division of Pediatric Cardiology, University Hospital of Lund, Lund, Sweden.
Pesonen
E
E
D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging* / Q000503:physiopathology* / Q000601:surgery; D001783:Blood Flow Velocity / Q000502:physiology; D003326:Coronary Circulation / Q000502:physiology*; D018619:Echocardiography, Doppler, Pulsed; D006801:Humans; D007231:Infant, Newborn; D012720:Severity of Illness Index