Changes

== Introduction ==

== Introduction ==

Arterial blood pressure is created by the combined forces, and complex interactions, of cardiac output, systemic vascular resistance (resistance produced mainly in the arterioles), and viscosity of the blood - Blood Pressure (BP) = Cardiac Output (CO) x Systemic Vascular Resistance (SVR). The arterial blood pressure is the force causing blood to flow through the arteries, into the capillaries, then back to the heart via the veins.

Arterial blood pressure is created by the combined forces, and complex interactions, of cardiac output, systemic vascular resistance (resistance produced mainly in the arterioles), and viscosity of the blood.

'''Blood Pressure (BP) = Cardiac Output (CO) x Systemic Vascular Resistance (SVR)'''

The arterial blood pressure is the force causing blood to flow through the arteries, into the capillaries, then back to the heart via the veins.

The left ventricle contracts (systole), ejecting blood into the aorta, creating a pressure pulse. This can be measured as the systolic blood pressure. Part of this blood that is ejected during systole remains within the distended arteries, and rebounds during diastole (relaxation of the ventricle), creating the diastolic blood pressure. An adequate blood pressure is required for normal blood flow, however, this does not mean that the presence of a normal arterial blood pressure guarantees that the blood flow is normal.

The left ventricle contracts (systole), ejecting blood into the aorta, creating a pressure pulse. This can be measured as the systolic blood pressure. Part of this blood that is ejected during systole remains within the distended arteries, and rebounds during diastole (relaxation of the ventricle), creating the diastolic blood pressure. An adequate blood pressure is required for normal blood flow, however, this does not mean that the presence of a normal arterial blood pressure guarantees that the blood flow is normal.