Volume 100, Issue 2, Pages 474-479 (August 1991) Intraluminal Pulsed Doppler Evaluation of the Pulmonary Artery Velocity Time Curve in a Canine Model of Acute Pulmonary Hypertension G. William Henry, M.D., Hiroshi Katayama, M.D., Manuel E. Lores, M.D., Carol L. Lucas, Ph.D., Jose I. Ferreiro CHEST Volume 100, Issue 2, Pages 474-479 (August 1991) DOI: 10.1378/chest.100.2.474 Copyright © 1991 The American College of Chest Physicians Terms and Conditions
FIGURE 1 Intraluminal needle probe. CHEST 1991 100, 474-479DOI: (10.1378/chest.100.2.474) Copyright © 1991 The American College of Chest Physicians Terms and Conditions
FIGURE 2 Schematic representation of probe placement axis (arrow) in the main pulmonary artery. The great vessels are viewed in cross section from above. A = anterior; AO = aorta; L = left; P = posterior; PA = main pulmonary artery; R = right. CHEST 1991 100, 474-479DOI: (10.1378/chest.100.2.474) Copyright © 1991 The American College of Chest Physicians Terms and Conditions
FIGURE 3 Representative flow velocity pattern in the pulmonary artery in a dog before and after embolization. Arrows indicate the onset of right ventricular ejection (1), the peak flow velocity (2), and the end of right ventricular ejection (3). CHEST 1991 100, 474-479DOI: (10.1378/chest.100.2.474) Copyright © 1991 The American College of Chest Physicians Terms and Conditions
FICURE 4 Consecutive tracings of flow velocity outlines in the pulmonary artery in a dog before and after embolization. Arrows indicate the onset of right ventricular ejection (1), the peak flow velocity (2), and the end of right ventricular ejection (3). Each measurement was obtained from an average of 10 to 15 consecutive cardiac cycles. CHEST 1991 100, 474-479DOI: (10.1378/chest.100.2.474) Copyright © 1991 The American College of Chest Physicians Terms and Conditions
FIGURE 5 The ratio of positive velocity time to negative velocity time is plotted against the mean pulmonary arterial pressure (MPAP) after embolization in one representative dog. CHEST 1991 100, 474-479DOI: (10.1378/chest.100.2.474) Copyright © 1991 The American College of Chest Physicians Terms and Conditions