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- W2000730704 abstract "Autologous blood clot was injected into six dogs to produce a graduated decrease in cardiac output (CO). The effects of an infusion of norepinephrine, titrated to specific end points, were recorded before embolization and at two levels of pulmonary hypertension. Simultaneous measurements of systemic and renal hemodynamics were made. Sequential blood clot injection increased (p<.01) pulmonary vascular resistance (PVR) from 1.3 to 13 to 33 mm Hg•L-1•min and reduced CO 45 percent and 75 percent (p<.01). Norepinephrine increased both stroke volume and CO (p<.01) in each condition and did not increase PVR. Since the biventricular filling pressures remained constant or fell slightly with norepinephrine, the increase in CO is best explained by an improvement in pump performance. There was no deterioration in renal blood flow or creatinine clearance with norepinephrine. The data suggested that in this model of right ventricular dysfunction, norepinephrine consistently improved myocardial performance without provoking further vasoconstriction in either the pulmonary or renal circulations. Autologous blood clot was injected into six dogs to produce a graduated decrease in cardiac output (CO). The effects of an infusion of norepinephrine, titrated to specific end points, were recorded before embolization and at two levels of pulmonary hypertension. Simultaneous measurements of systemic and renal hemodynamics were made. Sequential blood clot injection increased (p<.01) pulmonary vascular resistance (PVR) from 1.3 to 13 to 33 mm Hg•L-1•min and reduced CO 45 percent and 75 percent (p<.01). Norepinephrine increased both stroke volume and CO (p<.01) in each condition and did not increase PVR. Since the biventricular filling pressures remained constant or fell slightly with norepinephrine, the increase in CO is best explained by an improvement in pump performance. There was no deterioration in renal blood flow or creatinine clearance with norepinephrine. The data suggested that in this model of right ventricular dysfunction, norepinephrine consistently improved myocardial performance without provoking further vasoconstriction in either the pulmonary or renal circulations. Is Levophed Lethal?CHESTVol. 95Issue 6PreviewThe thin-walled right ventricle (RV) has received little attention in the past compared with its muscular neighbor, the left ventricle (LV).1,2 Recently, the availability of better bedside techniques to study RV function, such as 2D echocardiography, radionuclear angiography, and the fast-response thermistor catheter, have allowed us to understand the role of the RV in many clinical settings. RV dysfunction has been implicated in a spectrum of cardiopulmonary disorders including pulmonary embolism, COPD, ARDS, application of PEEP, sepsis, myocardial contusion, and response to cardiopulmonary bypass. Full-Text PDF" @default.
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- W2000730704 title "The Cardiopulmonary and Renal Hemodynamic Effects of Norepinephrine in Canine Pulmonary Embolism" @default.
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- W2000730704 doi "https://doi.org/10.1378/chest.95.6.1333" @default.
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