Counter-clockwise vortical blood flow in the main pulmonary artery in a patient with patent ductus arteriosus with pulmonary arterial hypertension: a cardiac magnetic resonance imaging case report. - Gert Reiter; Ursula Reiter; Gabor Kovacs; Gabriel Adelsmayr; Andreas Greiser; Aurélien F. Stalder; Horst Olschewski; Michael Fuchsjäger (BMC Medical Imaging, 2016)