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Related Concept Videos

Hypertension I: Introduction01:28

Hypertension I: Introduction

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,...
Hypertension III: Clinical Manifestations and Diagnostic Studies01:30

Hypertension III: Clinical Manifestations and Diagnostic Studies

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...
Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

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,...
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...
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...
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...

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Related Experiment Video

Updated: Jun 10, 2026

Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells
09:29

Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells

Published on: March 5, 2019

Endocrine hypertension: then and now.

William F Young1

  • 1Division of Endocrinology, Diabetes, Metabolism, Nutrition, and Internal Medicine, Mayo Clinic, Rochester, Minnesota 55905, USA. Young.William@Mayo.edu

Endocrine Practice : Official Journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists
|August 18, 2010
PubMed
Summary

Advances in diagnosing and treating pheochromocytoma and primary aldosteronism have been remarkable since their initial descriptions. Future research aims to refine genetic understanding and diagnostic precision for these adrenal gland conditions.

Related Experiment Videos

Last Updated: Jun 10, 2026

Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells
09:29

Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells

Published on: March 5, 2019

Area of Science:

  • Endocrinology
  • Nephrology
  • Oncology

Background:

  • Review of the initial successful treatments for pheochromocytoma (1926) and primary aldosteronism (1954).
  • Highlights the importance of clinical observation and scientific principles in early management.
  • Traces the historical progression of diagnostic and therapeutic strategies for these endocrine disorders.

Observation:

  • Early management relied on keen clinical observation and intuition.
  • Technological advancements have significantly improved diagnosis and treatment.
  • Key advances include laboratory diagnostics, radiology for tumor localization, and surgical techniques.

Findings:

  • Successful management of early cases demonstrated the feasibility of treating these conditions.
  • Subsequent literature reveals remarkable technological progress in diagnosis and surgery.
  • The evolution from clinical observation to sophisticated technological approaches is evident.

Implications:

  • Continued progress in pheochromocytoma management is expected through genetic discoveries and improved markers for malignancy.
  • Future research will focus on understanding bilateral idiopathic hyperaldosteronism and differentiating it from adenomas.
  • Clarifying the spectrum of primary aldosteronism and the role of genetic/environmental factors is crucial for future therapeutic strategies.