title: Artery-to-artery anastomosis in monochorionic twins.
abstract: We describe Doppler signals in artery-to-artery anastomoses of two monochorionic twin pregnancies. Flow velocity waveforms demonstrated cyclic changes in systolic velocities with intermittent reversal of end-diastolic velocities. A computer model showed that this was the result of two opposing pulsatile blood flow waveforms with different velocities and frequencies.
authors.affiliation: Department of Obstetrics and Gynecology, King's College School of Medicine and Dentistry, London, United Kingdom.
authors.forename: K
authors.initials: K
authors.lastname: Hecher
authors.forename: E
authors.initials: E
authors.lastname: Jauniaux
authors.forename: S
authors.initials: S
authors.lastname: Campbell
authors.forename: C
authors.initials: C
authors.lastname: Deane
authors.forename: K
authors.initials: K
authors.lastname: Nicolaides
mesh_terms: D001159:Arterio-Arterial Fistula / Q000000981:diagnostic imaging*; D001783:Blood Flow Velocity; D005260:Female; D005330:Fetofetal Transfusion / Q000000981:diagnostic imaging*; D006801:Humans; D011247:Pregnancy; D014430:Twins, Monozygotic; D016216:Ultrasonography, Prenatal; D014469:Umbilical Arteries / Q000002:abnormalities* / Q000000981:diagnostic imaging