Alex Neumann
University of Chicago
47 Papers
906 Citations
Alex Neumann is an academic researcher from University of Chicago. The author has contributed to research in topics: Afterload & Contractility. The author has an hindex of 24, co-authored 47 publications. Previous affiliations of Alex Neumann include University of the Witwatersrand & National Institutes of Health.
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Papers
The differential effects of positive inotropic and vasodilator therapy on diastolic properties in patients with congestive cardiomyopathy.
TL;DR: Positive inotropic therapy with beta 1-adrenoceptor agonists enhances early diastolic distensibility by accelerating relaxation, augmenting filling, and reducing end-systolic chamber size.
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Physiologic mechanisms governing hemodynamic responses to positive inotropic therapy in patients with dilated cardiomyopathy.
TL;DR: In this article, the authors assessed the response of the failing left ventricle to positive inotropic agents, including the magnitude of contractile abnormality and compensatory mechanisms, in patients with dilated cardiomyopathy.
134
Contrast echocardiography during coronary arteriography in humans: perfusion and anatomic studies.
Steven B. Feinstein,Roberto M. Lang,Candace Dick,Alex Neumann,Jafar Al-Sadir,K. G. Chua,John D. Carroll,Ted Feldman,Kenneth M. Borow +8 more
TL;DR: Sonicated meglumine sodium diatrizoate solution (Renografin-76), which contains microbubbles measuring 4.5 +/- 2.8 micrograms in diameter by laser analysis, was used as the echocardiographic contrast agent during elective coronary arterriography in 14 patients without significant coronary artery disease to determine myocardial perfusion patterns.
124
Left ventricular contractility and contractile reserve in humans after cardiac transplantation.
TL;DR: The chronically denervated, transplanted, nonrejecting human left ventricle demonstrates normal contractile characteristics and reserve.
120
Left ventricular mechanics in preeclampsia
Roberto M. Lang,Gabriella Pridjian,Ted Feldman,Alex Neumann,Marshall D. Lindheimer,Kenneth M. Borow +5 more
TL;DR: Left ventricular contractility was similar between normotensive and preeclamptic subjects at all stages of the study, and when load is eliminated as a confounding variable, the decrements in overall left ventricular performance measured in patients with preeclampsia reflect a mechanically appropriate response to increased afterload.
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