نتایج جستجو برای: systolic shortening

تعداد نتایج: 71184  

2005
VIDYA S. BANKA HAJIME YAMAZAKI RICHARD H. HELFANT

The effects of digitalis (ouabain infusion, priming dose of 10 Ag/kg/min followed by 2.0 gg/kg/min) on subepicardial and subendocardial ischemic dysfunction during partial occlusion (59.4% reduction in coronary flow) and total coronary occlusion were evaluated in 14 dogs using pairs of ultrasonic crystals implanted in the epicardial and endocardial layers. After 30 minutes of partial coronary o...

Journal: :Circulation 1982
V S Banka H Yamazaki J B Agarwal M M Bodenheimer R H Helfant

The effects of digitalis (ouabain infusion, priming dose of 10 micrograms/kg/min followed by 2.0 micrograms/kg/min) on subepicardial and subendocardial ischemic dysfunction during partial occlusion (59.4% reduction in coronary flow) and total coronary occlusion were evaluated in 14 dogs using pairs of ultrasonic crystals implanted in the epicardial and endocardial layers. After 30 minutes of pa...

2001
Jonathan N. Bella Vittorio Palmieri Jennifer E. Liu Dalane W. Kitzman Albert Oberman Steven C. Hunt Paul N. Hopkins D. C. Rao Donna K. Arnett Richard B. Devereux

The relation of impaired left ventricular relaxation, as measured by prolonged isovolumic relaxation time, to ventricular systolic function in hypertension remains uncertain in population-based samples. In the Hypertension Genetic Epidemiology Network (HyperGEN) Study, echocardiograms were analyzed in 1457 hypertensive participants without diabetes, $21 valvular regurgitation, or coronary disea...

Journal: :Hypertension 1988
G de Simone L Di Lorenzo G Costantino D Moccia S Buonissimo O de Divitiis

Forty-three subjects with uncomplicated primary hypertension and without echocardiographic left ventricular hypertrophy and 54 normotensive volunteers were studied by two-dimensional targeted M-mode echocardiography to evaluate systolic function and contractility before the development of compensatory hypertrophy. The ratio of peak systolic pressure to end-systolic dimension was used to assess ...

Journal: :Hypertension 2001
J N Bella V Palmieri J E Liu D W Kitzman A Oberman S C Hunt P N Hopkins D C Rao D K Arnett R B Devereux

The relation of impaired left ventricular relaxation, as measured by prolonged isovolumic relaxation time, to ventricular systolic function in hypertension remains uncertain in population-based samples. In the Hypertension Genetic Epidemiology Network (HyperGEN) Study, echocardiograms were analyzed in 1457 hypertensive participants without diabetes, >/=2+ valvular regurgitation, or coronary dis...

Journal: :Circulation 2008
Allen Cheng Tom C Nguyen Marcin Malinowski George T Daughters D Craig Miller Neil B Ingels

BACKGROUND Myocardial fibers are grouped into lamina (or sheets) 3 to 4 cells thick. Fiber shortening produces systolic left ventricular (LV) wall thickening primarily by laminar extension, thickening, and shear, but the regional variability and transmural distribution of these 3 mechanisms are incompletely understood. METHODS AND RESULTS Nine sheep had transmural radiopaque markers inserted ...

Journal: :European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 2005
Gerald D Buckberg Manuel Castellá Morteza Gharib Saleh Saleh

OBJECTIVE To study the sequential shortening of Torrent-Guasp's 'rope-heart model' of the muscular band, and analyze the structure-function relationship of basal loop wrapping the outer right and left ventricles, around the inner helical apical loop containing reciprocal descending and ascending spiral segments. METHODS In 24 pigs (27-82 kg), temporal shortening by sonomicrometer crystals was...

Journal: :European review for medical and pharmacological sciences 2016
E A Özkan H E Khosroshahi M Kılıç U A Geçit E Domur

OBJECTIVE Obesity is a chronic metabolic disorder and may associate with cardiovascular geometrical, structural and functional changes. The aim of this study is to assess the relationship between body mass index (BMI), body surface area (BSA) and arterial-ventricular elasticity (Ea and Ees respectively) and cardiovascular coupling and myocardial wall stress and fiber stress in obese children. ...

Journal: :Canadian journal of anaesthesia = Journal canadien d'anesthesie 1994
S E Belo R Kolesar C D Mazer

The intravenous administration of propofol is associated with a considerable decrease in arterial blood pressure. The present study was undertaken to test the hypothesis that myocardial function is not affected by propofol and therefore does not contribute to the hypotensive effect of this anaesthetic agent. Propofol was administered in anaesthetized, open-chest dogs by direct arterial infusion...

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