Physiological significance of the geometrical shape of the left ventricle: Course and curvature of the individual myocardial fibers

1970 ◽  
Vol 32 (4) ◽  
pp. 599-600
Author(s):  
P. C. Voukydis
Keyword(s):  
Left Ventricle ◽  
Physiological Significance ◽  
Geometrical Shape ◽  
Myocardial Fibers ◽  
The Individual

Recent Advances in the Physics and Chemistry of Rubber. IV. Crystallization in Rubbers

1945 ◽  
Vol 18 (4) ◽  
pp. 724-730
Author(s):  
L. R. G. Treloar
Keyword(s):  
Physical Properties ◽  
Crystalline Phase ◽  
Geometrical Shape ◽  
Chain Molecules ◽  
Recent Advances ◽  
Structural Regularity ◽  
Adequate Representation ◽  
The Individual ◽  
Simple Picture ◽  
Long Chain

Abstract In dealing with elasticity and with swelling, we have thus far considered rubber to be composed of a loose network of randomly-kinked long-chain molecules. This simple picture does not fully represent the structure of rubber under all conditions, and gives no explanation of many of the remarkable physical properties of raw rubber. For a more adequate representation we are forced to include the effects of crystallization. In this Part we shall examine some of these effects, and see what light they throw on the mechanism of the process of crystallization and on the structure of rubber generally. At the outset we may find some difficulty in accepting the theory that rubber may contain a crystalline phase. This is because we are accustomed to think of a crystal as possessing a precise geometrical shape. We cannot identify such geometrical forms in rubber. But, on consideration, we see that the essential attribute of a crystal is the internal regularity of the spacing of its constituent atoms. The external geometrical regularity, where it exists, is derived from this more fundamental internal structural regularity. It is frequently found, however, that the internal regularity is not accompanied by external regularity. This is true, for example, of the metals, which are invariably crystalline. The absence of external regularity is due to the small size of the individual crystallites. The same considerations apply to rubbers.

Absence of the left ventricular myocardium in a newborn

1996 ◽  
Vol 6 (4) ◽  
pp. 344-347 ◽  
Author(s):  
Angelika Lindinger ◽  
Yvonne Masur ◽  
Hans-Gerhard Limbach
Keyword(s):  
Aortic Valve ◽  
Left Ventricle ◽  
Ventricular Myocardium ◽  
Arrhythmogenic Right Ventricular Dysplasia ◽  
Left Ventricular ◽  
Adolescent And Young Adult ◽  
Left Ventricular Myocardium ◽  
Fatty Replacement ◽  
Myocardial Fibers ◽  
The Right

SummaryAbsence of myocardial fibers in the right ventricle is the essence of so-called Uhl's anomaly, which should be distinguished from the fatty replacement producing arrhythmogenic right ventricular dysplasia of the adolescent and young adult. In this report, we describe a newborn with nearly complete absence of the myocardium of the left ventricle. The infant died on the seventh day because of myocardial incompetence of the left ventricle, which was unable to open the aortic valve.

Mechanical Effects of Myofibril Disarray on Cardiac Function

2013 ◽  
Author(s):  
A. I. Veress ◽  
A. Giannakidis ◽  
G. T. Gullberg
Keyword(s):  
Left Ventricle ◽  
Cardiac Function ◽  
Normal Myocardium ◽  
Fiber Distribution ◽  
Mechanical Effects ◽  
Myocardial Fibers

Myocardial disarray is a fiber distribution that deviates away from the tightly organized, parallel alignment of myocardial fibers that characterizes the normal myocardium. This coherently-organized distribution of the myofibers results in the twisting contraction of the normal left ventricle (LV). With myofiber disarray, the fibers have random directionality, either locally or globally, within the LV.

Double inlet left ventricle associated with a subpulmonary tissue tag, dissection of the pulmonary trunk and pheochromocytoma

1997 ◽  
Vol 7 (3) ◽  
pp. 334-336 ◽  
Author(s):  
Shaun A.C. Medlicott ◽  
Joyce R. Harder ◽  
Lloyd N. Denmark
Keyword(s):  
Congenital Heart Disease ◽  
Heart Disease ◽  
Left Ventricle ◽  
Congenital Heart ◽  
Pulmonary Trunk ◽  
Primitive Neuroectodermal Tumors ◽  
Neuroectodermal Tumors ◽  
The Individual ◽  
Double Inlet Left Ventricle

AbstractPrevious studies have demonstrated the individual association of subpulmonary tissue tags, dissection of the pulmonary trunk and primitive neuroectodermal tumors with congenital heart disease. We are reporting a case of double inlet left ventricle with all these associations as it is exceptionally rare for all features to be manifest in one individual.

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