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Related Concept Videos

Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

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Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
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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...
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Hypertension III: Clinical Manifestations and Diagnostic Studies01:30

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Hypertension is asymptomatic and also referred to as the "silent killer" until it progresses to a severe stage or causes target organ disease. Patients may experience symptoms stemming from the strain on blood vessels and tissues in various organs or the heart's increased workload.Physical exams might show no abnormalities other than high blood pressure. Signs of vascular damage, when present, correspond to the organs supplied by the affected vessels, leading to target organ damage. For...
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Hypertension I: Introduction01:28

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Hypertension is a widespread, long-term medical condition where blood pressure in the arteries remains elevated. It is characterized by systolic blood pressure readings of 130 mm Hg or above or diastolic blood pressure (DBP) readings of 80 mm Hg or higher. Unmanaged hypertension poses significant health risks, making the distinction between primary (or essential) hypertension and secondary hypertension crucial, as their management and implications vary.Primary HypertensionPrimary hypertension,...
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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
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Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
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Echocardiographic Assessment Using Subxiphoid-Only Examination for Hypotensive Patients
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Hypervolemia for hypertension pathophysiology: a population-based study.

Ender Hür1, Melih Özişik2, Cihan Ural2

  • 1Division of Nephrology, Bülent Ecevit University, Zonguldak, Turkey.

Biomed Research International
|September 2, 2014
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Summary

High blood pressure may be linked to increased extracellular fluid volume in the general population. Assessing volume status could aid in managing hypertension effectively.

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Area of Science:

  • Cardiology
  • Nephrology
  • Public Health

Background:

  • The relationship between hypertension and hypervolemia is established in renal disease patients.
  • Fluid distribution defects in the general population concerning blood pressure remain unclear.

Purpose of the Study:

  • To investigate potential fluid distribution defects in relation to blood pressure in a general population.
  • To determine if extracellular water indices correlate with blood pressure levels.

Main Methods:

  • A population-based survey conducted in Turkey.
  • Collected data included demographics, anthropometrics, blood pressure, and biochemical markers.
  • Bioimpedance analysis using a Body Composition Monitor assessed fluid status.

Main Results:

  • A significant correlation was found between extracellular water to height ratio (ECW/height) and systolic blood pressure (SBP).
  • ECW/height, age, BMI, and diabetes were identified as risk factors for high SBP.
  • Higher BMI and diabetes were associated with increased ECW/height and SBP; smoking was linked to lower SBP and fat tissue index.

Conclusions:

  • Elevated extracellular fluid volume indices may accompany high blood pressure in the general population.
  • Future assessments of volume status could enhance the evaluation of antihypertensive pharmacological interventions.