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Hypertension I: Introduction

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 II: Pathophysiology

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,...

Hypertension V: Nursing Management

Hypertension V: Nursing Management

The nursing management of hypertension involves accurately assessing symptoms, making a comprehensive nursing diagnosis, collaborating with patients to set goals, and implementing targeted interventions to mitigate the condition's impact and improve patient well-being.Comprehensive AssessmentThe initial step in nursing care for hypertension involves a thorough patient assessment. It includes evaluating symptoms such as headaches, dizziness, blurred vision, and previous hypertension episodes.

Second Order systems II

Second Order systems II

In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.

First Order Systems

First Order Systems

First-order systems, such as RC circuits, are foundational in understanding dynamic systems due to their straightforward input-output relationship. Analyzing their responses to different input functions under zero initial conditions reveals significant insights into system behavior.
When a first-order system is subjected to a unit-step input, its response is characterized by its transfer function. By applying the Laplace transform of the unit-step input to the transfer function, expanding the...

Second Order systems I

Second Order systems I

A servo system exemplifies a second-order system, featuring a proportional controller and load elements that ensure the output position aligns with the input position. The relationship between these components is described by a second-order differential equation. Applying the Laplace transform under zero initial conditions yields the transfer function, showing how inputs are converted to outputs in the system.
By reinterpreting the system, one can derive the closed-loop transfer function, which...

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Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus

Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus

Published on: May 16, 2025

Systemic lupus erythematosus and hypertension.

Pamela Munguia-Realpozo¹, Claudia Mendoza-Pinto², Cristina Sierra Benito³

¹Systemic Autoimmune Diseases Research Unit, Hospital de Especialidades, UMAE, Instituto Mexicano del Seguro Social, Puebla, Puebla, Mexico; Immunology and Rheumatology, Medicine School, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico.

Autoimmunity Reviews

|August 16, 2019

Summary

Hypertension is common in systemic lupus erythematosus (SLE) and linked to cardiovascular disease, but its causes and management in SLE patients are poorly understood. This review explores hypertension mechanisms, screening, and treatment in SLE.

Keywords:

Cardiovascular disease Guidelines Hypertension Systemic lupus erythematosus

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Area of Science:

Nephrology
Rheumatology
Cardiology

Background:

Systemic lupus erythematosus (SLE) significantly increases cardiovascular disease (CVD) risk, partly due to hypertension.
Hypertension is more prevalent in SLE patients than in the general population.
The mechanisms driving hypertension in SLE remain unclear.

Purpose of the Study:

To review the potential mechanisms of hypertension in SLE.
To evaluate current literature on hypertension screening and management in SLE patients.
To highlight the need for specific hypertension guidelines in SLE.

Main Methods:

Literature review of studies on hypertension in SLE.
Discussion of pathophysiological mechanisms.
Analysis of 24-h ambulatory blood pressure monitoring data.

Main Results:

Hypertension is a frequent complication in SLE patients.
Hypertension in SLE is associated with increased organ damage, stroke, and cognitive issues.
Current clinical guidelines lack specific recommendations for managing hypertension in SLE.

Conclusions:

Understanding hypertension mechanisms in SLE is crucial.
24-h ambulatory blood pressure monitoring is valuable for assessing BP in SLE.
Tailored hypertension management strategies are needed for SLE patients.