1. 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 (August 1991)
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

2. FIGURE 1 Intraluminal needle probe.
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

3. 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.
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

4. 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).
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

5. 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.
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

6. 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  , DOI: ( /chest )
Copyright © 1991 The American College of Chest Physicians Terms and Conditions