https://novaprd-lb.newcastle.edu.au/vital/access/manager/Index ${session.getAttribute("locale")} 5 Central opiate system regulation of baroreflex control of coronary conductance https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12908 Wed 28 Oct 2020 09:44:30 AEDT ]]> Effects of central nervous opoid and 5-hydroxytrptamine interactions on coronary conductance regulation in the conscious dog https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12724 Wed 24 Jul 2013 22:25:20 AEST ]]> Accuracy of continuous non-invasive impedance cardiographic measurements of stroke volume in exercising man https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12691 2 rebreathing method, however, still suffers from relatively poor accuracy at rest, and gated pool radionuclide scanning requires high levels of medical technological expertise under confined laboratory conditions. Impedance cardiography (IC) does not suffer from these disadvantages. We have evaluated the accuracy of impedance cardiography against accepted invasive methods e.g. thermodilution (TD), dye dilution (DD), the electromagnetic flowmeter (EM), in models where different degrees of experimental control could be applied. This approach was necessary due to the empirical aspects of the Kubicek formula for the calculation of stroke volume using IC. In addition, we have assessed the accuracy of the independent methods in clinical usage, as the assessment of accuracy of impedance cardiography would depend to some extent on the accuracy of the independent method used. Using regression analysis of simultaneous estimates of SV and CO, the accuracy of TD (against EM) in rabbits is 1.0% (S.E. of a single CO estimate expressed as % of mean CO (492 ± 3.5 ml), and that of IC SV measurements in the dog (against EM) is 1.7% (22.2 ± 0.4ml). In man, the accuracy of right heart thermodilution SV measurements (against DD) is 3.9% (75.4 3.0ml), and that for IC SV measurements (against TD) is 2.1 % (58.2 ± 1.2ml). These results indicate that both the invasive TD, and the non-invasive IC systems used in our laboratories have comparable and satisfactory accuracies for SV measurement, and suggest that under conditions of normal hearts and lungs, IC is useful for accurate and continuous non-invasive stroke volume measurements in exercising man, provided certain conditions of usage are satisfied.]]> Wed 24 Jul 2013 22:25:16 AEST ]]> Central nervous μ-opioid and 5-hydroxytryptamine influence on baroreflex evoked coronary vasodilatation in the dog https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12746 Wed 24 Jul 2013 22:24:31 AEST ]]> A comparison between thermodilution, electromagnetic and Doppler methods for cardiac output measurement in the rabbit https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12680 Wed 24 Jul 2013 22:23:50 AEST ]]> Coronary haemodynamic effect of nifedipine (Bay a 1040) and glyceryl trinitrate in unanaesthetized dogs https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12657 Wed 24 Jul 2013 22:23:43 AEST ]]> Effects of anaesthesia on regional coronary control mechanisms https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:2994 Sat 24 Mar 2018 08:30:22 AEDT ]]> Central nervous system opiate and 5-hydroxytryptamine influences on baroreflex control of the coronary circulation https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12702 Sat 24 Mar 2018 08:18:24 AEDT ]]> Impedance cardiography for cardiac output measurement: An evaluation of accuracy and limitations https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12763 Sat 24 Mar 2018 08:18:18 AEDT ]]> Dynamic range of evoked cholinergic and non-cholinergic non-adrenergic vasodilatation in bronchoesphageal circulation in the awake dog https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12782 Sat 24 Mar 2018 08:17:34 AEDT ]]> Modulation of baroreflex gain regulating coronary vasodilator responses by the central μ-opioid receptor agonist fentanyl https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12783 Sat 24 Mar 2018 08:17:34 AEDT ]]> Dynamic control of the bronchial circulation in the conscious dog: preliminary data on the role of alpha and beta adrenoceptors, and of cholinoceptors https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12747 Sat 24 Mar 2018 08:16:36 AEDT ]]> Baroreflex control of coronary conductance in normotensive and renal hypertensive dogs with complete heart block https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12715 Sat 24 Mar 2018 08:16:19 AEDT ]]> Evaluation of the Doppler flowmeter for measurement of blood flow in small vessels of unanaesthetized animals https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:12713 Sat 24 Mar 2018 08:16:19 AEDT ]]>