Doppler predictions of pulmonary artery pressure, flow, and resistance in adults

Comparative effects of angiotensin II on Doppler parameters of left and right heart systolic and diastolic blood flow.

“…Several previous studies have shown that PoAT correlates closely with mean pulmonary arterial pressure and pulmonary vascular resistance [13][14][15] be supported by in vitro data showing that angiotensin II produces positive inotropic effects in the isolated heart [19,20]. Since angiotensin II also produces right ventricular preload reduction by venodilatation [12], the net effect on PoAcc is probably a summation of responses.…”

Acute effects of ANP and BNP on hypoxic pulmonary vasoconstriction in humans.

“…We have shown the use of pulsed-wave Doppler to be highly reproducible [15], whilst others have validated its use in comparison with catheter measurement of MPAP [16,25,26]. However, one possible limitation of this non-invasive methodology is that our calculation of total pulmonary vascular resistance excludes measurement of pulmonary capillary wedge pressure (PCWP) as we would consider it unethical to insert Swan-Ganz catheters into healthy volunteers solely for research purposes.…”

“…The hypoxic gas mixture was produced from separate cylinders of nitrogen and oxygen fitted with variable flow valves. Gases were mixed in a 25 [ 16]. Aortic cross-sectional area (CSA) was measured by M-mode echocardiography (Vingmed SD50).…”

Granulocyte Colony-Stimulating Factor Prevents Progression of Monocrotaline-Induced Pulmonary Arterial Hypertension in Rats

“…The AT/ET value correlated inversively to mean PA pressure and resistance. 12 The ratio of RVOTD/AoD is thought to be a parameter of RV dilatation 6 and the diastolic eccentricity index reportedly increases in patients with both right ventricular volume and pressure overload. 7 These findings suggest that MCT injection promotes, whereas G-CSF improves pulmonary hypertension under noninvasive conditions.…”