Assessing the pulmonary vascular responsiveness to oxygen with proton MRI
AS Kizhakke Puliyakote… - Journal of Applied …, 2024 - journals.physiology.org
Ventilation-perfusion matching occurs passively and is also actively regulated through
hypoxic pulmonary vasoconstriction (HPV). The extent of HPV activity in humans, particularly …
hypoxic pulmonary vasoconstriction (HPV). The extent of HPV activity in humans, particularly …
The effect of supine exercise on the distribution of regional pulmonary blood flow measured using proton MRI
The Zone model of pulmonary perfusion predicts that exercise reduces perfusion
heterogeneity because increased vascular pressure redistributes flow to gravitationally …
heterogeneity because increased vascular pressure redistributes flow to gravitationally …
Measurement of the distribution of ventilation-perfusion ratios in the human lung with proton MRI: comparison with the multiple inert-gas elimination technique
RC Sá, AC Henderson, T Simonson… - Journal of Applied …, 2017 - journals.physiology.org
We have developed a novel functional proton magnetic resonance imaging (MRI) technique
to measure regional ventilation-perfusion (V̇A/Q̇) ratio in the lung. We conducted a …
to measure regional ventilation-perfusion (V̇A/Q̇) ratio in the lung. We conducted a …
Pulmonary ventilation: dynamic MRI with inhalation of molecular oxygen
H Hatabu, E Tadamura, Q Chen, KW Stock, W Li… - European journal of …, 2001 - Elsevier
We have recently demonstrated a non-invasive technique to visualize pulmonary ventilation
in humans with inhalation of molecular oxygen as a paramagnetic contrast agent. In the …
in humans with inhalation of molecular oxygen as a paramagnetic contrast agent. In the …
Inhaled nitric oxide alters the distribution of blood flow in the healthy human lung, suggesting active hypoxic pulmonary vasoconstriction in normoxia
AK Asadi, RC Sá, NH Kim… - Journal of Applied …, 2015 - journals.physiology.org
Hypoxic pulmonary vasoconstriction (HPV) is thought to actively regulate ventilation-
perfusion (V̇a/Q̇) matching, reducing perfusion in regions of alveolar hypoxia. We …
perfusion (V̇a/Q̇) matching, reducing perfusion in regions of alveolar hypoxia. We …
Impact of vasodilation on oxygen-enhanced functional lung MRI at 0.55 T
Background Oxygen-enhanced magnetic resonance imaging (OE-MRI) can be used to
assess regional lung function without ionizing radiation. Inhaled oxygen acts as a T1 …
assess regional lung function without ionizing radiation. Inhaled oxygen acts as a T1 …
Regional pulmonary perfusion patterns in humans are not significantly altered by inspiratory hypercapnia
Pulmonary vascular tone is known to be sensitive to both local alveolar Po2 and Pco2.
Although the effects of hypoxia are well studied, the hypercapnic response is relatively less …
Although the effects of hypoxia are well studied, the hypercapnic response is relatively less …
Impact of oxygen inhalation on the pulmonary circulation: assessment by magnetic resonance (MR)-perfusion and MR-flow measurements
S Ley, M Puderbach, F Risse… - Investigative …, 2007 - journals.lww.com
Purpose: Oxygen-enhanced magnetic resonance (MR)-ventilation imaging of the lung is
based on the inhalation of a high concentration of oxygen (hyperoxia). However, the effect of …
based on the inhalation of a high concentration of oxygen (hyperoxia). However, the effect of …
Chronic hypoxia-induced pulmonary hypertension does/does not lead to loss of pulmonary vasculature
JT Berg - Journal of Applied Physiology, 2007 - journals.physiology.org
To the Editor: In their initial statement supporting the hypothesized loss of precapillary
arteries in chronic hypoxia Rabinovitch, Chesler, and Molthen (6) provide evidence derived …
arteries in chronic hypoxia Rabinovitch, Chesler, and Molthen (6) provide evidence derived …
Ventilation–perfusion heterogeneity measured by the multiple inert gas elimination technique is minimally affected by intermittent breathing of 100% O2
AR Elliott, AS Kizhakke Puliyakote… - Physiological …, 2020 - Wiley Online Library
Proton magnetic resonance (MR) imaging to quantify regional ventilation–perfusion () ratios
combines specific ventilation imaging (SVI) and separate proton density and perfusion …
combines specific ventilation imaging (SVI) and separate proton density and perfusion …