Blood pressure. Definition

Medical Definition: blood pressure

Pressure exerted by blood against artery walls. Depends on cardiac output, resistance of the arteries, as determined by vascular tone and elasticity, and viscosity of blood. Is the driving force of the bloodstream. The maximum pressure occurs near the end of cardiac systole (maximum or systolic blood pressure), while the minimum pressure occurs at the end of ventricular diastole and is called the minimum or diastolic pressure. Mean blood pressure corresponds to the average blood pressure levels obtained during the cardiac cycle. The blood pressure regulation is carried out according to the metabolic needs of the moment, following some complex mechanisms that become part signals from mechanoreceptors and chemoreceptors efferent and afferent circulatory centers, changes in contractility and frequency heart rate, etc.

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