Results 341 to 350 of about 5,349,086 (384)
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Nature, 1950
FROM experiments by several investigators it can be assumed that the heart mechanism of most Crustacea differs from the mechanism of the heart of vertebrates. The heart in Crustacea appears to possess a neurogenic automatism, as has been shown by its reactions to drugs and by histological examination.
Nelly E. Krijgsman, B. J. Krijgsman
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FROM experiments by several investigators it can be assumed that the heart mechanism of most Crustacea differs from the mechanism of the heart of vertebrates. The heart in Crustacea appears to possess a neurogenic automatism, as has been shown by its reactions to drugs and by histological examination.
Nelly E. Krijgsman, B. J. Krijgsman
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Journal of Cardiac Surgery, 2006
Even though studies on isolated papillary muscles and cardiomyocytes can be applied to the mechanics of a beating heart, it is not always easy for physicians to relate these findings to clinical medicine. Thus, it is important to extend the studies to intact heart either in simulations or in animal models and even better to validate the results with ...
Amod P. Tendulkar, Alden H. Harken
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Even though studies on isolated papillary muscles and cardiomyocytes can be applied to the mechanics of a beating heart, it is not always easy for physicians to relate these findings to clinical medicine. Thus, it is important to extend the studies to intact heart either in simulations or in animal models and even better to validate the results with ...
Amod P. Tendulkar, Alden H. Harken
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Annual Review of Physiology, 1979
The goal implicit in the research reviewed above is to describe the contractile behavior of heart muscle in terms of crossbridge and filament behavior. It is necessary to elucidate these details in cardiac muscle because of the distinct biochemical differences between skeletal and cardiac myosin.
Louis A. Mulieri +2 more
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The goal implicit in the research reviewed above is to describe the contractile behavior of heart muscle in terms of crossbridge and filament behavior. It is necessary to elucidate these details in cardiac muscle because of the distinct biochemical differences between skeletal and cardiac myosin.
Louis A. Mulieri +2 more
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1971
The question of why the myocardium fails to contact normally and ultimately leads to congestive failure, has occupied the attention of both clinicians and basic scientists for decades. Nevertheless, it is only within recent years that improvements in clinical diagnostic techniques and development of more sophisticated physiological and biochemical ...
Edward W. Gertz, Edmund H. Sonnenblick
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The question of why the myocardium fails to contact normally and ultimately leads to congestive failure, has occupied the attention of both clinicians and basic scientists for decades. Nevertheless, it is only within recent years that improvements in clinical diagnostic techniques and development of more sophisticated physiological and biochemical ...
Edward W. Gertz, Edmund H. Sonnenblick
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Mechanisms of Heart Failure [PDF]
, 2015 Heart failure is a pathophysiological condition in which the circulation of blood provided by the pumping activity of the heart fails to deliver oxygen at a rate commensurate with tissue metabolic requirements. Heart failure is most often caused by cardiac injury related to myocardial infarction, myocarditis, or cardiac toxins, or chronic pressure or ...
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Canadian Journal of Medical Sciences, 1952
A practical mechanical heart and lung is described in which glass syringes are used to replace the ventricles. The pistons of the syringes are operated by a special cam rather than a simple crank. Thus the volume changes in the syringes are made to follow those of the mammalian ventricles.
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A practical mechanical heart and lung is described in which glass syringes are used to replace the ventricles. The pistons of the syringes are operated by a special cam rather than a simple crank. Thus the volume changes in the syringes are made to follow those of the mammalian ventricles.
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Mechanisms of Mechanical Heart Valve Cavitation in an Electrohydraulic Total Artificial Heart
ASAIO Journal, 2005Until now, we have estimated cavitation for mechanical heart valves (MHV) mounted in an electrohydraulic total artificial heart (EHTAH) with tap water as a working fluid. However, tap water at room temperature is not a proper substitute for blood at 37 degrees C.
Soichiro Kitamura +2 more
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EXPERIENCE WITH THE MECHANICAL HEART
Journal of the American Medical Association, 1954It has been approximately three years since the mechanical heart project was started. The apparatus is so devised that four different types of substitutions for the heart and lungs can be performed. These consist of (a) bypass of the right side of the heart, (b) bypass of the left side of the heart, (c) bypass of both sides of the heart while the lungs
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Propagation Mechanisms in Heart
Annual Review of Physiology, 1979The myocardium is composed of an assembly of short cells, separated at their ends by the intercalated disks (IDs). The fluid in the 10 cleft gap is continuous with the bulk interstitial fluid (ISF), and the width of the gap averages about 200 A.. Regions where the two membranes come into closer proximity are termed the gap junctions.
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EXHIBIT OF THE MECHANICAL HEART
Archives of Surgery, 1955THE FOLLOWING is an exhibit of the Dodrill-GMR Mechanical Heart. This was displayed at the 1953 session of the American Medical Association in New York and won the Hektoen Bronze Medal for original investigation. Since that time, it has been requested by, and given to, the Smithsonian Institution of Washington, D. C., for permanent preservation.
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