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All › Diagnosis › Diagnostic Techniques and Procedures › Diagnostic Techniques, Respiratory System › Respiratory Function Tests › Pulmonary Gas Exchange › Ventilation-Perfusion Ratio

Ventilation-Perfusion Ratio (0)

      Articles on Ventilation-Perfusion Ratio

      1. 18F-FDG uptake rate is a biomarker of eosinophilic inflammation and airway response in asthma.
        R Scott RS Harris, José G JG Venegas, ... Benjamin D BD Medoff

        crossref 52(11):1713-20 1 Nov 2011 PMID 21990575

        We found systematic reductions in regional $$\stackrel{\cdot }{Q}$$, $$s{\stackrel{\cdot }{V}}_{A}$$, and Fgas and increased ω in all subjects. The ratio of eosinophil count (allergen to diluent) was linearly related (R(2) = 0.9917, P < 0.001) to the ratio of K(i). CONCLUSION: Regional K(i) meas...
      2. Respiratory physiology at altitude.
        C Sandberg and J Naylor

        J R Army Med Corps 157(1):29-32 (2011) PMID 21465907

        The changes in respiratory physiology that occur with increasing altitude are driven by the fall in the partial pressure of oxygen that occurs with decreasing barometric pressure. At altitude, respiratory system changes occur which impact on each step of the oxygen cascade that occurs within the body...
      3. A review of electrocardiography in pulmonary embolism: recognizing pulmonary embolus masquerading as ST-elevation myocardial infarction.
        Kanwal Pratap Singh KP Raghav, Premraj P Makkuni, and Vincent M VM Figueredo

        Rev Cardiovasc Med 12(3):157-63 (2011) PMID 22145193

        We review the differential diagnosis of ST elevation and the assorted spectrum of ECG changes seen in PE....
      4. Inhalation anesthesia increases V/Q regional heterogeneity during spontaneous breathing in healthy subjects.
        Sven Nyrén, Peter Radell, ... Alejandro Sánchez-Crespo

        Anesthesiology 113(6):1370-5 (2010) PMID 21068662

        We hypothesized that inhalation anesthesia influences the intrapulmonary distribution of ventilation (V) and perfusion (Q), leading to less advantageous V/Q matching. Ten healthy volunteers were studied in supine position on two separate occasions, once awake and once during mild anesthesia (sevoflu...
      5. Recombinant angiotensin-converting enzyme 2 improves pulmonary blood flow and oxygenation in lipopolysaccharide-induced lung injury in pigle...
        Benedikt Treml, Nikolaus Neu, ... Alexander Loeckinger

        Crit Care Med 38(2):596-601 (2010) PMID 19851091

        Angiotensin-converting enzyme 2 attenuates arterial hypoxemia, pulmonary hypertension, and redistribution of pulmonary blood flow in a piglet model of acute respiratory distress syndrome, and may be a promising substance for clinical use....
      6. A mathematical model of pulmonary gas exchange under inflammatory stress
        Angela A Reynolds, G G Bard Ermentrout, and Gilles G Clermont

        J Theor Biol 264(2):13 (2010) PMID 20083125 PMCID PMC2856815

        We first derived a partial differential equations model of gas exchange on a small physiological unit of the lung ( approximately 25 alveoli), which we refer to as a respiratory unit (RU). We next developed a simple model of the acute inflammatory response and implemented its effects within a RU, cr...
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      7. Can plasma D-dimer predict the result of a ventilation-perfusion scan?
        Thomas T Grüning, Mehrdad M Khonsari, ... Tim T Nokes

        Audio, Transactions of the IRE Profession... 34(3):179-84 (2010) PMID 20416481

        We retrospectively looked at 840 patients in whom both ventilation-perfusion scan and D-dimer assay were performed within 48 h. The negative predictive value of a negative D-dimer assay was 96% for emergency admissions and 98% for inpatients. We present the cases of two patients with negative D-dime...
      8. Volumetric capnography: in the diagnostic work-up of chronic thromboembolic disease.
        Marcos Mello Moreira, Renato Giuseppe Giovanni Terzi, ... Otavio Rizzi Coelho

        Vasc Health Risk Manag (2010) PMID 20531949

        We report the case of a patient whose diagnosis of PE was made via pulmonary arteriography. The clinical pretest revealed a moderate probability of the patient having PE, and the DD result was negative; however, the VCap associated with arterial blood gases result was positive. The patient underwent...
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      9. N-terminal natriuretic peptide and ventilation-perfusion lung scan in sickle cell disease and thalassemia patients with pulmonary hypertensi...
        Galila M GM Mokhtar, Amira A M AA Adly, ... Ahmed T AT Khairy

        Hemoglobin 34(1):78-94 (2010) PMID 20113292

        The aim of this study was to determine the prevalence of pulmonary hypertension (PH) in sickle cell disease and thalassemia patients in relation to clinical and laboratory parameters of hemolysis and hemosidersosis, as well as plasma N-terminal pro-brain natriuretic peptide (NT-pro-BNP). The study a...
      10. Assessment of resting perfusion defect in patients with acute myocardial infarction: comparison of myocardial contrast echocardiography with...
        Maria M Olszowska, Magdalena M Kostkiewicz, ... Wiesława W Tracz

        Kardiol Pol 67(8A):1013-8 (2009) PMID 19784906

        Myocardial contrast echocardiography correlates very well with CE-MRI in the assessment of myocardial perfusion after PCI in AMI. Contrast-enhanced MRI is accurate technique for assessing the infarct zone. Identification by CE-MRI of transmural necrosis was associated with more impaired left ventric...
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