نتایج جستجو برای: dobutamine

تعداد نتایج: 3617  

Journal: :Circulation 1993
R Schulz J Rose C Martin O E Brodde G Heusch

BACKGROUND Short-term hibernating myocardium is characterized by a decrease in contractile function in proportion to the reduced myocardial blood flow. Myocardial creatine phosphate content, initially decreased during the first minutes of ischemia, returns to near-control values, the ischemia-induced net lactate production is attenuated, and the myocardium remains viable despite ongoing hypoper...

Journal: :Circulation journal : official journal of the Japanese Circulation Society 2014
Satoshi Yoshino Andrew Cassar Yoshiki Matsuo Joerg Herrmann Rajiv Gulati Abhiram Prasad Ryan J Lennon Lilach O Lerman Amir Lerman

BACKGROUND  Myocardial bridging (MB) results in compression of the coronary artery lumen in systole, extending into diastole with resultant hemodynamic alternation as reflected by fractional flow reserve (FFR). MB has also been associated with coronary endothelial dysfunction. The objective of this study was to investigate relationship between FFR with dobutamine challenge and coronary microvas...

Journal: :Circulation journal : official journal of the Japanese Circulation Society 2010
Katsuomi Iwakura Atsushi Okamura Yasushi Koyama Motoo Date Yoshiharu Higuchi Koichi Inoue Ryusuke Kimura Hiroyuki Nagai Michio Imai Yuko Toyoshima Makito Ozawa Norihisa Ito Yukinori Okazaki Masahiko Shibuya Shigemiki Omiya Takashi Takagi Daisuke Morisawa Kenshi Fujii

BACKGROUND Low-dose dobutamine stress echocardiography (DSE) assesses myocardial viability at the early stage of acute myocardial infarction (AMI), but its assessment is subjective and variable. Automated function image (AFI) determines global longitudinal peak strain (GLPS) based on tissue tracking technique. The ability of GLPS obtained by AFI during dobutamine stress to assess myocardial via...

Journal: :American journal of physiology. Heart and circulatory physiology 1998
Stephen P Bell Judit Fabian Martin M LeWinter

Restoring forces, which are generated when the left ventricle contracts below its equilibrium volume (Veq), are responsible for diastolic suction. Their magnitude is inversely related to end-systolic volume (ESV). In previous studies in which the mitral valve was replaced with a prosthesis, increased contractility was shown to augment restoring forces independently of ESV. In the present study,...

Journal: :Clinical chemistry 1998
B S Karon T M Daly M G Scott

Dopamine and dobutamine have recently been shown to produce a negative interference in several biochemical tests that use peroxide and peroxidase to generate a chromophore. To define the chemical mechanism of this interference, we examined the effects of dopamine and dobutamine in various peroxidase-based biochemical tests. Dopamine interfered stoichiometrically with peroxidase-based tests that...

Journal: :European heart journal 1997
S Iliceto L Galiuto A Marchese P Colonna S Oliva P Rizzon

AIMS The study was set up to evaluate the functional role of post-infarct preserved microvascular integrity. Low dose dobutamine echocardiography and myocardial contrast echocardiography were used to study patients before hospital discharge who had suffered a recent myocardial infarction and had a patent infarct-related artery (TIMI flow grade 3). METHOD In the dysfunctioning infarct area, th...

Journal: :Cardiology journal 2014
Peter Mitro Pavol Murin Gabriel Valocik Milos Simurda

BACKGROUND Overall response rate to cardiac resynchronization therapy (CRT) is still not optimal. The aim of the study was to evaluate the influence of the regional myocardial contractile reserve during dobutamine infusion in the area of left ventricular (LV) electrode on the response rate and reverse remodeling LV in patients receiving CRT. METHODS Biventricular pacemaker was implanted in 41...

Journal: :Circulation. Heart failure 2010
Stig Müller Ole-Jakob How Øyvind Jakobsen Stig Eggen Hermansen Assami Røsner Thor Allan Stenberg Truls Myrmel

BACKGROUND We addressed the hypothesis that the inotropic drugs dobutamine and levosimendan both induce surplus oxygen consumption (oxygen wasting) relative to their contractile effect in equipotent therapeutic doses, with levosimendan being energetically more efficient. METHODS AND RESULTS Postischemically reduced left ventricular function (stunning) was created by repetitive left coronary o...

2018
Dorthe Viemose Nielsen Christian Torp-Pedersen Regitze Kuhr Skals Thomas A. Gerds Zidryne Karaliunaite Carl-Johan Jakobsen

BACKGROUND Several choices of inotropic therapy are available and used in relation to cardiac surgery. Comparisons are necessary to select optimal therapy. In Denmark, dobutamine and milrinone are the two inotropic agents most commonly used to treat post-bypass low cardiac output syndrome. This study compares all-cause mortality with these drugs. METHODS In a retrospective observational study...

Journal: :Journal of applied physiology 2012
Tracey L Bryan Sean van Diepen Mohit Bhutani Miriam Shanks Robert C Welsh Michael K Stickland

The development of intrapulmonary shunts with increased cardiac output during exercise in healthy humans has been reported in several recent studies, but mechanisms governing their recruitment remain unclear. Dobutamine and dopamine are inotropes commonly used to augment cardiac output; however, both can increase venous admixture/shunt fraction (Qs/Qt). It is possible that, as with exercise, in...

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