Adequate oral or intravenous doses of a betaadrenergic receptor-blocking drug, nethalide,' produce no significant changes in the resting oxygen consumption, heart rate, cardiac output, and systemic mean arterial or mean right atrial pressures of patients with spontaneous hyperthyroidism (1). These findings do not support the concept that the hemodynamic changes in hyperthyroidism are mediated t...

From the embryonic state to the end of life, the elements of the circulatory system are exposed to hemodynamic forces associated with the circulation of blood. Various levels of intraluminal (transmural) pressure and wall shear stress represent the natural environment for the tissues of the vascular wall. Physiological or pathological changes in the level of these forces elicit active responses...

Hemodynamics in sepsis change as sepsis develops. Initial hemodynamics of sepsis often are much different from later stages of sepsis, shifting from low cardiac output states to high cardiac output states. Tissue oxygenation also changes with initial mixed venous oxyhemoglobin (Svo2) or central venous oxyhemoglobin (Scvo2) levels below normal, with later stages reflecting high values. These cha...

Recent interest in functional hemodynamic monitoring for the bedside assessment of cardiovascular insufficiency has heightened. Functional hemodynamic monitoring is the assessment of the dynamic interactions of hemodynamic variables in response to a defined perturbation. Accordingly, fluid responsiveness can be predicted in a quantities fashion by measuring as arterial pulse pressure variation ...

K nowledge of hemodynamic principles is crucial to an understanding of cardiovascular physiology. This topic can be effectively taught by discussing simple physical principles and basic algebraic equations. A variety of examples from everyday observations can be used to illustrate the physical principles underlying the flow of blood though the circulation, thereby giving the student an experien...

Knowledge of hemodynamic principles is crucial to an understanding of cardiovascular physiology. This topic can be effectively taught by discussing simple physical principles and basic algebraic equations. A variety of examples from everyday observations can be used to illustrate the physical principles underlying the flow of blood through the circulation, thereby giving the student an experien...

Background: Today, coronary artery bypass graft surgery (CABG) in many patients is commonly used to treat complications of the disease. Aim: This study aimed to evaluate the impact of cardiac rehabilitation on hemodynamic parameters in patients undergoing CABG. Methods: : In this clinical trial which was conducted in Rajaee Hospital of Tehran University of Medical Sciences 100 patients after co...

Control of blood pressure and of blood flow is essential for maintenance of homeostasis. The hemodynamic state is adjusted by intrinsic, neural, and hormonal mechanisms to optimize adaptation to internal and environmental challenges. In the last decade, many studies showed that modification of the mouse genome may alter the capacity of cardiovascular control systems to respond to homeostatic ch...