Coronary flow reserve (CFR) is a key sign of coronary artery disease, namely how the coronary arteries that feed blood to the heart may adapt to various physiological situations such as exercise, ...

Left: 3D power-Doppler volumes overlaid on anatomical volumes of the myocardium in the left-anterior descending artery. Right: Absolute flow velocities estimated by 4D ultrafast ultrasound flow ...

Coronary artery disease (CAD) is caused by plaque buildup in the wall of arteries that supply blood to the heart. When you purchase through links on our site, we may earn an affiliate commission. Here ...

Coronary steal syndrome is a condition in which blood is taken from a narrowed artery in the heart and rerouted to — in other words, stolen by — other blood vessels. This condition can occur when some ...

In 1921, Otto Loewi (1873-1961) conducted experiments in frogs that used electrical stimulation to activate the vagus nerve. He discovered that stimulating the vagus nerve triggered the release of a ...