14 Result(s)
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Chapter
Joseph S. Janicki
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Chapter
The Role of Gas Analysis and Cardiopulmonary Exercise Testing
Apart from the measurement of the vital signs, evaluation of exercise performance constitutes one of the most crucial parameters in the clinical assessment of a \nobreak patient. Many different methods are cur...
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Cardiac Mast Cells as Mediators of Ventricular Remodeling
Mast cells are known to store and release a variety of biologically active mediators including TNF-α, and proteases such as tryptase and chymase. With cardiac chamber distension there is a release of atrial natri...
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Gender mediated cardiac protection from adverse ventricular remodeling is abolished by ovariectomy
Gender differences in the prevalence of cardiovascular disease have been observed both clinically and experimentally. These cardioprotective effects have frequently been attributed to female hormones, however,...
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Characteristics and Mechanisms of Angiotensin II-Related Myocardial Damage
Chronic, pathophysiological elevations of angiotensin (Ang) II cause myocyte necrosis and coronary vascular damage. These adverse effects are mediated by the angiotensin II type 1 (AT1) receptor and are, therefor...
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Introduction
To meet the metabolic requirements of the body over a wide range of physical activity, the heart must be capable of increasing its cardiac output seven-to eightfold. This is accomplished by acute increases in ...
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Myocardial Interstitial Collagen Matrix Remodeling in Response to a Chronic Elevation in Ventricular Preload or Afterload
Fibrillar collagen is an essential component of the extracellular matrix of the heart that surrounds and interconnects the coronary microcirculation, individual myocytes, groups of cardiac myofibrils, muscle f...
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Ventricular Remodeling in Heart Failure: The Role of Myocardial Collagen
Collagen which is present in the myocardium in relatively small amounts is the most abundant structural protein of the connective tissue network. Its structural organization consists of a complex weave of coll...
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Progressive Ventricular Dilatation in Heart Failure: The Role of Myocardial Collagenase
Fibrillar collagen is an integral component of the extracellular matrix of the heart, linking the numerous myocardial components and ensuring an efficient functioning organ. Specifically it provides for muscle...
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Structural and Functional Consequences of Myocardial Collagen Remodeling
Myocardial fibrillar collagens provide for muscle fiber and cardiac myocyte alignment and impart a tensile strength to the myocardium that maintains ventricular shape and size, and governs tissue stiffness. Th...
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Myocardial Fibrosis: Structural Basis for Diastolic Dysfunction
Left ventricular hypertrophy (LVH) is the single most important prognostic factor associated with adverse cardiovascular events, including heart failure and sudden death, attributable to cardiovascular disease...
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Myocardial Collagen and Its Functional Role
Even though normally present in relatively small amounts, myocardial collagen strongly influences ventricular diastolic function. Removal of less than half of the normal amount results in a dilated ventricle w...
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Left Ventricular Systolic Resistance and Its Role in Coupling the Ventricle to the Arterial Circulation
The overall performance of the left ventricle coupled to the arterial circulation is dependent on the intrinsic mechanical properties of the individual subsystems and their mutual interaction. The myocardium o...
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Influence of Extracardiac Forces on the Cardiopulmonary Unit
The cardiopulmonary unit consists of the heart and lungs. It is responsible for the transport and exchange of oxygen and carbon dioxide between the metabolizing tissues and the atmosphere (Weber et al. 1983). ...
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Left ventricular performance and its systolic mechanical properties
The myocardium is a viscoelastic material whose mechanical properties are reflected in the pum** behavior of the ventricular chamber. Hence, the relationships between left ventricular (LV) pressure, volume, ...
