Diastolic blood pressure is almost always lower than the systolic blood pressure. All the deoxygenated blood from the peripheries is collected into the superior and inferior vena cavae and then sent back to the right atrium. Diastolic blood pressureĭiastolic blood pressure is the pressure that is measured at the time of relaxation of the heart. It occurs with aging because of decreased elasticity of the blood vessels. Systolic hypertension is a term used when only the systolic blood pressure is raised. The normal range of blood pressure is between 90-140 millimeters of mercury and abbreviated as mmHg.Ī systolic blood pressure if higher than 140 mmHg, is considered as high and can be labeled as hypertension if readings are raised on multiple occasions. Systolic blood pressure is for the same reason, a little higher than diastolic blood pressure and it is always written at the top of the equation. It is the time when blood is actively pumped into the large vessels and then all the peripheral vessels of the body. Systolic blood pressure is the pressure that we measure at the time of active contraction of the left ventricle of the heart.
