290 research outputs found
Richardson Students to Perform at Meyerson
No full textA cutline announcing a performance by East Texas State University music students at the Meyerson Symphony Center in Dallas, Texas. Some of the students include Brooke Sramek, Kelsey Branum, Chris K. Scott, and Alissa Karin from Richardson, Texas.https://lair.etamu.edu/scua-press-releases-all/1293/thumbnail.jp
Multipath curved planar reformation of the peripheral arterial tree in CT angiography.
No full textThe study was approved by the institutional review board, and informed consent was obtained. The purpose of the study was to prospectively quantify the angular visibility range, determine the existence of orthogonal viewing pairs, and characterize the conditions that cause artifacts in multipath curved planar reformations (MPCPRs) of the peripheral arterial tree in 10 patients (eight men and two women; mean age, 69 years; range, 54-80 years) with peripheral arterial occlusive disease. Percentage of segments with the maximal possible visibility score of 1 was significantly greater (odds ratio, 1.42; P<.001) for MPCPRs than for maximum intensity projections. One or more orthogonal viewing pairs were identified for all above-knee arterial segments, and artifactual vessel distortion was observed when the vessel axis approached a horizontal course in MPCPRs. (c) RSNA, 2007
The influence of extravascular lung water on cardiac output measurements using thoracic impedance cardiography
No full textThe purpose of this study was to investigate the influence of pulmonary oedema as measured with the double indicator dilution technique on the accuracy of cardiac output (CO) measurement using thoracic impedance cardiography (TIC) compared with thermodilution in thirteen sepsis patients. Differences in the Kubicek and Sramek-Bernstein equation with respect to pulmonary oedema were explored theoretically and experimentally. From a parallel two cylinder model a hypothesis can be derived that CO determined with the Kubicek equation is oedema independent, whereas CO determined using the Sramek-Bernstein equation is oedema dependent. Experimentally, CO determined using Kubicek's equation correlated better with thermodilution CO (r = 0.75) than CO determined with the Sramek-Bernstein equation (r = 0.25). The effect of oedema on the accuracy of TIC was investigated by comparing the differences in the CO of impedance and thermodilution to the extravascular lung water index. For the Kubicek equation the difference was not influenced by oedema (r = 0.04, p = 0.84), whereas for the Sramek-Bernstein equation the difference was affected by oedema (r = 0.39, p = 0.05). Thus, the effects of pulmonary oedema on the accuracy of TIC measurements can better be understood with the parallel cylinder model. Moreover, the Kubicek equation still holds when pulmonary oedema is present, in contrast to the Sramek-Bernstein equatio
The influence of weight on stroke volume determination by means of impedance cardiography in cardiac surgery patients
No full textOBJECTIVES: Obesity is thought to be one of the conditions in which the impedance cardiographic method is less reliable for estimating stroke volume (SV). This led to the introduction of a weight correction factor, sigma, into the equation according to Sramek and Bernstein. However, no scientific evidence has been published to support the use of this factor. The objectives of the present study are to evaluate the influence of body weight on the accuracy of impedance cardiography and to validate Bernstein's weight correction factor by comparison with thermodilution in patients after coronary bypass surgery. DESIGN: Prospective clinical study. SETTING: A surgical intensive care unit in a university hospital. PATIENTS: 37 consecutive patients 24-36 h after coronary bypass surgery, sub-divided into a normal-weight group (n = 24), patients whose weight deviated less than 15% from their ideal weight, and an obese group (n = 13), patients whose weight deviated more than 15% from their ideal weight. MEASUREMENTS: Kubicek's impedance cardiographic method and Sramek and Bernstein's method to assess SV are applied and compared to thermodilution. In order to study the validity of sigma, the results are compared between 24 patients with normal weight and 13 obese patients. RESULTS: A significant correlation between miscalculation of SV by impedance cardiography and the degree of obesity for Sramek and Bernstein's method is found when sigma is not included in the equation (r = -0.55, p < 0.05). This relation, however, remained significant when sigma was included in the equation (r = -0.40, p < 0.05). Kubicek's method shows no significant correlation for this relation (r = -0.30). Besides this, Sramek and Bernstein's method underestimates SV significantly in the obese group, independent of the use of sigma in the equation. These results are explained as being intrinsic to the equation, according to Sramek and Bernstein. In the whole group the impedance-derived SV did not significantly differ from SV as measured by means of thermodilution, independent of the method used to calculate SV. However, a considerably better correlation and agreement (mean difference +/- 2 standard deviations is found when Kubicek's method is applied (r = 0.90, 0.5 +/- 17.1 ml vs 0.64, -4.9 +/- 31.8 ml for Sramek and Bernstein's method). CONCLUSIONS: Weight significantly influences Sramek and Bernstein's method of impedance cardiography, whereas Kubicek's method is not biased by this factor
Authors of National Anthems
No full textStamps from around the world depicting famous writers who inspired composers. Anton Wildgans, Austria; Tompa Mihaly, Arany Janos, Hungary; Robert Burns, United Kingdom, Jean Racine, France; Julio Arboleda, Colombia; Karel Borovsky, Frana Sramek, Czechoslovakia; Guluck Artimofsky, M. Petrauskas, Russia; Jose Reyes, Dominican Republic; Natives singing Malagasy National Anthem, Madagascar; Juan Leon Mera, Ecuador; Wilhelmus van Nassouwe, Netherlands; General Juan Jose Canas, El Salvador; Rakoczy, Hungary; Vishnu Narayn, India; Norbert Raharisoa, Madagascar; Persian Composer, Persia
Standardization of non-invasive impedance cardiography for assessment of stroke volume: comparison with thermodilution
No full textSince its introduction by Kubicek and colleagues, impedance cardiography has been suggested as a non-invasive, simple, safe and cost-effective method of measuring stroke volume. Several controversial reports on its validity have been published. Pitfalls of this method included the nature of the electrode system and the validity of the equations. Therefore, the purpose of this study was to compare two different spot electrode arrays and the two most frequently used stroke volume equations with each other and with thermodilution. In 37 patients, 24-36 h after cardiac surgery, we performed simultaneous measurements of stroke volume with impedance cardiography (SVIC) and with thermodilution (SVTD). SVIC was obtained using the lateral spot (LS) electrode array, according to Bernstein, and a newly proposed modified semi-circular (MSC) spot electrode array. The equations of Kubicek and Sramek-Bernstein were used to calculate SVIC. The Sramek-Bernstein equation was valid only when the LS array was used; the Kubicek equation determined SVTD correctly only when the MSC array was used. However, a considerably better correlation and agreement (mean difference (2 SD)) was found between SVIC and SVTD for the latter (r = 0.90, 0.5 (17.1) ml vs r = 0.64, -4.9 (31.8) ml for the Sramek-Bernstein equation). We conclude that the most valid measurement of stroke volume using impedance cardiography was obtained when the MSC array was used together with Kubicek's equation
Die politische Verantwortung des Landesfürsten
No full textMit diesem Beitrag möchte ich den Begriff der politischen Verantwortung auf seinen rechtlichen Gehalt prüfen. Er soll in dem Kontext analysiert werden, in dem er geäussert wurde, nämlich zusammen mit der Ankündigung, das Fürstenhaus sei nur unter bestimmten Bedingungen bereit, Verantwortung für und in Liechtenstein auszuüben. Überdies werde ich der Frage nachgehen, ob sich der Erbprinz auf die Verfassung stützen kann, wenn er Liechtensteinerinnen und Liechtensteiner, die eine andere Ausgestaltung der Monarchie möchten, auf die Verfassungsbestimmung zur Abschaffung der Monarchie verweist
- …
