TY - JOUR AU - Smith, H J; Grottum, P; Simonsen, S TI - Ultrasonic assessment of abdominal venous return. I. Effect of cardiac action and respiration on mean velocity pattern, cross-sectional area and flow in the inferior vena cava and portal vein JO - Acta Radiol Diagn IS - 05 VL - 26 PY - 1985 SP - 581 EP - 588 ER -