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Related Concept Videos

Hypertension and Regulation of Blood Pressure01:18

Hypertension and Regulation of Blood Pressure

Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
Factors affecting Blood pressure01:28

Factors affecting Blood pressure

Several physiological and lifestyle factors influence blood pressure (BP). Understanding these factors is crucial as they are significant in patient education and blood pressure management.
Physiological Factors:
Neural Regulation of Blood Pressure01:18

Neural Regulation of Blood Pressure

The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
Blood Pressure01:30

Blood Pressure

Blood pressure (BP) is the pressure or force of blood exerted on the artery's walls as it circulates through the body. It is essential for maintaining blood flow throughout the body.
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the diastolic...
Blood Pressure01:24

Blood Pressure

The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...
Hormonal Regulation of Blood Pressure01:17

Hormonal Regulation of Blood Pressure

Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction while...

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Related Experiment Video

Updated: Jun 3, 2026

Hydra, a Computer-Based Platform for Aiding Clinicians in Cardiovascular Analysis and Diagnosis
07:51

Hydra, a Computer-Based Platform for Aiding Clinicians in Cardiovascular Analysis and Diagnosis

Published on: September 26, 2018

Does blood pressure variability modulate cardiovascular risk?

Peter M Rothwell1

  • 1University Department of Clinical Neurology, John Radcliffe Hospital, Level 6, West Wing, Headington, Oxford OX3 9DU, UK. peter.rothwell@clneuro.ox.ac.uk

Current Hypertension Reports
|April 6, 2011
PubMed
Summary
This summary is machine-generated.

Blood pressure variability, not just average levels, independently predicts vascular events and stroke risk. This finding impacts hypertension treatment guidelines and drug effectiveness.

Related Experiment Videos

Last Updated: Jun 3, 2026

Hydra, a Computer-Based Platform for Aiding Clinicians in Cardiovascular Analysis and Diagnosis
07:51

Hydra, a Computer-Based Platform for Aiding Clinicians in Cardiovascular Analysis and Diagnosis

Published on: September 26, 2018

Area of Science:

  • Cardiovascular Medicine
  • Hypertension Research
  • Clinical Pharmacology

Background:

  • Hypertension is a major risk factor for end-organ damage and vascular events.
  • Current clinical guidelines for hypertension diagnosis and treatment primarily focus on mean blood pressure (BP).
  • The precise mechanisms by which hypertension leads to organ damage remain incompletely understood.

Purpose of the Study:

  • To review evidence on the independent role of BP variability in vascular risk.
  • To examine how BP variability influences the effectiveness of antihypertensive medications.
  • To inform clinical practice regarding hypertension management.

Main Methods:

  • Systematic review of existing literature on blood pressure variability.
  • Analysis of studies correlating BP variability with stroke and other vascular events.
  • Evaluation of drug-class specific effects on BP variability and clinical outcomes.

Main Results:

  • Blood pressure variability independently predicts the risk of stroke and other vascular events, beyond mean BP levels.
  • Differences in the effectiveness of various BP-lowering drug classes in preventing stroke are explained by their effects on BP variability.
  • Evidence suggests BP variability is a significant, underappreciated factor in cardiovascular risk.

Conclusions:

  • Blood pressure variability is a critical determinant of cardiovascular risk in hypertension.
  • Clinical guidelines should consider BP variability alongside mean BP for comprehensive hypertension management.
  • Targeting BP variability may enhance the efficacy of antihypertensive therapies in stroke prevention.