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Blood Pressure/La Presión Arterial

Blood Pressure/La Presión Arterial

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This lesson will identify what blood pressure is and factors that affect blood pressure.

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Tutorial

En esta lección vamos a describir la presión arterial o la presión sanguinea, así como los factores que la pueden afectar.

TERMS TO KNOW
  • Blood Pressure

    The pressure that blood exerts on the wall of a vessel that is measured in units of millimeters of mercury (mmHg). Blood pressure is the driving force that creates blood flow throughout the vessels of the body.

  • Systolic Pressure

    One of two measures of blood pressure, systolic pressure is a higher pressure that occurs when the left ventricle of the heart is in systole (contracting) and pumping blood into the arteries, causing their pressure to increase.

  • Diastolic Pressure

    One of the two measures of blood pressure, diastolic pressure is a lower pressure that occurs when the left ventricle of the heart is in diastole (resting) which causes the pressure in the systemic arteries to drop.

  • Hypertension

    The clinical term for high blood pressure, a person is considered to be hypertensive after three consecutive measurements of 140/90 mmHg or higher.

  • Vasodilation

    The term used to describe when the muscular walls of a vessel relax causing the diameter of the vessel to enlarge. Vasodilation decreases blood pressure and makes it easier for blood to flow through a vessel.

  • Vasoconstriction

    A term used to describe when the muscular walls of a vessel tense causing the diameter of the vessel to decrease. Vasoconstriction increases blood pressure and makes it more difficult for blood to flow through a vessel.