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Related Concept Videos

Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

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Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of...
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Acute Coronary Syndrome I: Introduction01:30

Acute Coronary Syndrome I: Introduction

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Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
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Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

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Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
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Restless Leg Syndrome and Night Terrors01:27

Restless Leg Syndrome and Night Terrors

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Restless Leg Syndrome (RLS), also known as Willis-Ekbom disease, is a neurological disorder characterized by an uncontrollable urge to move the legs due to uncomfortable sensations. These sensations typically occur during periods of rest or inactivity, particularly when lying down or sitting, and can severely disrupt sleep.
The exact cause of RLS is not fully understood, but it is believed to involve dopamine, a neurotransmitter that helps regulate muscle movement. Imbalances in dopamine levels...
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Acute Coronary Syndrome V: Nursing Management01:26

Acute Coronary Syndrome V: Nursing Management

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Nursing Assessment:Nursing management of acute coronary syndrome (ACS) involves taking the patient's history, focusing on primary complaints such as chest pain, dyspnea, and excessive sweating (diaphoresis), as well as other symptoms like back or jaw pain, nausea, vomiting, palpitations, dizziness, and fatigue. The nurse also reviews the patient's history of cardiac events, risk factors such as hypertension, diabetes, smoking, family history, and current medications.In the objective assessment,...
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Nephrotic Syndrome II : Assessment and Medical Management01:26

Nephrotic Syndrome II : Assessment and Medical Management

247
IntroductionNephrotic syndrome is a kidney disorder marked by excessive protein loss in the urine, leading to various systemic complications. This condition often results from damage to the glomeruli—the kidney's filtering units—causing proteinuria, low blood protein levels, and fluid retention. Understanding the assessment, diagnosis, and management of nephrotic syndrome is essential for effective treatment and prevention of further kidney damage.AssessmentPatient History: Document...
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Related Experiment Video

Updated: Feb 8, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
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[Postural orthostatic tachycardia syndrome].

Louise Schouborg Brinth1, Kirsten Pors, Jesper Mehlsen

  • 1louisebrinth@live.dk.

Ugeskrift for Laeger
|July 10, 2018
PubMed
Summary

Postural orthostatic tachycardia syndrome (POTS) is a condition causing rapid heart rate increase when standing. Management focuses on lifestyle changes and medications for symptom relief.

Area of Science:

  • Cardiology
  • Neurology
  • Immunology

Background:

  • Postural orthostatic tachycardia syndrome (POTS) is a complex condition involving dysautonomia and potential autoimmunity.
  • It manifests as significant heart rate increases upon standing, leading to symptoms of reduced cerebral blood flow and overactive sympathetic nervous system responses.
  • The condition's heterogeneous nature presents diagnostic and therapeutic challenges.

Purpose of the Study:

  • To summarize the key diagnostic criteria for POTS.
  • To outline current management strategies for POTS patients.
  • To provide an overview of the condition's pathophysiology.

Main Methods:

  • Diagnostic criteria involve assessing heart rate response during a head-up tilt test.
  • Evaluation includes identifying abnormal heart rate increments (≥30 bpm or >120 bpm).

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  • Clinical assessment focuses on symptoms of cerebral hypoperfusion and sympathoexcitation.

    • Main Results:

    • The primary diagnostic marker is a heart rate increase of ≥30 bpm or to >120 bpm within 10 minutes of standing.
    • Patients commonly experience symptoms like dizziness, fatigue, and palpitations due to cerebral hypoperfusion.
    • The condition is linked to autonomic dysfunction and possible autoimmune processes.

    Conclusions:

    • POTS diagnosis relies on specific heart rate criteria during postural changes.
    • Effective management requires a multi-faceted approach, combining lifestyle adjustments and pharmacological interventions.
    • Further research into the autoimmune aspects of POTS is warranted to refine treatment.