With aging there are changes in the cardiovascular system, which result in alterations in cardiovascular physiology. The changes in cardiovascular physiology must be differentiated from the effects of ...

Our cardiovascular system is an example of a demand-driven supply-and-demand system in which the demand of individual organs for blood flow determines the supply, or output, from the heart. This ...

Coronary arteries are a vital part of the human heart, providing it with oxygen-rich blood so that it can work. By comparing the hearts of mammals, birds, reptiles, fish and frogs, a ...

Scientists have a new understanding of the protective effects of caffeine on the cardiovascular system. While its stimulant effects have long been characterized, a team of Canadian researchers have ...

In a study of 130 volunteers conducted at the Federal University of São Carlos, a drastic decrease in heart rate variability, i.e. the heart’s ability to adapt to environmental and physiological ...

Hemodialysis (HD) is a life-saving treatment for more than 1,700,000 patients with chronic kidney disease (CKD) stage V. Every year the HD population becomes increasingly older (average age: 75 years) ...