Afterload is the pressure that the heart must work against to eject blood during systole (ventricular contraction). Afterload is proportional to the average arterial pressure. [1]

2024年7月2日 · Afterload is a fancy word for the pressure required for the left ventricle to force blood out of the body to exert during systole. In other words, it’s the effort of the ventricle …

Afterload can be thought of as the "load" that the heart must eject blood against. In simple terms, the afterload of the left ventricle is closely related to the aortic pressure.

2023年4月24日 · The afterload of any contracting muscle is defined as the total force that opposes sarcomere shortening minus the stretching force that existed before contraction. Applying this definition to the heart, afterload can be most easily described as the "load" against which the heart ejects blood.

2023年8月30日 · The main difference between preload and afterload is that preload is the pressure that occurs at the initial stretching of the cardiac myocytes, whereas afterload is the force that occurs when the heart pumps blood.

Afterload = left ventricular wall tension required to overcome resistance to ejection (impedance to ejection of blood from the heart into the arterial circulation). developed as ventricular muscle fibres shorten during isovolumetric contraction & ejection phases of systole.

2020年4月28日 · Afterload can be defined as the resistance to ventricular ejection - the "load" that the heart must eject blood against. It consists of two main sets of determinant factors: P, the ventricular transmural pressure, which is the difference between the intrathoracic pressure and the ventricular cavity pressure.

Afterload is the amount of work the heart has to do to pump blood to the rest of the body. It's determined by the resistance to flow in the arteries. Blood vessels can become narrower (vasoconstriction) or wider (vasodilation), and this affects afterload. The heart muscle contracts and relaxes to pump blood.

Afterload is a concept of the work or pressure needed by the ventricle to eject blood out of the semilunar valve. The most common influence on afterload is the vascular tone or resistance to blood flow.

Afterload is the hemodynamic parameter that reflects the force that the left ventricle has to overcome to eject blood through the aortic valve. The most common pathologic process that …