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Related Concept Videos

Diabetic Ketoacidosis ll: Pathophysiology01:22

Diabetic Ketoacidosis ll: Pathophysiology

Diabetic ketoacidosis (DKA) is a metabolic emergency characterized by hyperglycemia, ketonemia, and metabolic acidosis. It results from severe insulin deficiency and an excess of counterregulatory hormones, leading to uncontrolled lipolysis, ketogenesis, and widespread electrolyte and fluid disturbances.Pathophysiology The central event in DKA is a profound loss of insulin action. Without insulin, glucose uptake in insulin-dependent tissues is impaired, while hepatic glucose production...
Diabetic Ketoacidosis l: Introduction01:25

Diabetic Ketoacidosis l: Introduction

DefinitionDiabetic ketoacidosis (DKA) is an acute, life-threatening complication of diabetes mellitus, characterized by a triad of hyperglycemia (blood glucose >250 mg/dL), ketonemia or ketonuria, and metabolic acidosis (arterial pH <7.30 and serum bicarbonate <18 mEq/L). It results from insulin deficiency combined with elevated levels of counterregulatory hormones—glucagon, catecholamines, cortisol, and growth hormone—leading to increased lipolysis, hepatic ketone production, and...
Depolarizing Blockers: Mechanism of Action01:28

Depolarizing Blockers: Mechanism of Action

Depolarizing blockers act on skeletal muscle fibers' membranes and induce their depolarization. Most depolarizing blockers have two quaternary N+ atoms that bind the nicotinic acetylcholine receptors and cause neuromuscular blockade within minutes.
Succinylcholine is the most commonly used depolarizing blocker. Chemically, it constitutes two molecules of acetylcholine joined together by an acetate methyl group. They act on the receptors in the same way as acetylcholine. Because succinylcholine...
Antihypertensive Drugs: Potassium-Sparing Diuretics01:28

Antihypertensive Drugs: Potassium-Sparing Diuretics

Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...
Secondary Spinal Cord Injury llI: Pathophysiology01:25

Secondary Spinal Cord Injury llI: Pathophysiology

Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...
Hyperosmolar Hyperglycemic State01:21

Hyperosmolar Hyperglycemic State

Hyperosmolar Hyperglycemic State, or HHS, is a serious and life-threatening complication of type 2 diabetes mellitus. It is characterized by three main features: severe hyperglycemia, profound dehydration, and elevated serum osmolality, all occurring without significant ketoacidosis.HHS typically develops in older adults or individuals with limited access to fluids. This may result from illness, cognitive impairment, or medications such as diuretics or corticosteroids. These factors reduce...

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Related Experiment Video

Updated: May 18, 2026

Swimming Induced Paralysis to Assess Dopamine Signaling in Caenorhabditis elegans
07:36

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Published on: April 3, 2019

Secondary hypokalaemic paralysis.

Ankush Gupta1, Vibhu Narain Khanna, Imran Rizvi

  • 1Department of Medical, Military Hospital Jodhpur, Jodhpur, Rajasthan, India. drankushgupta@gmail.com

BMJ Case Reports
|October 5, 2012
PubMed
Summary

This case study shows how electrocardiogram (ECG) findings of hypokalemia (low potassium) can guide treatment for acute flaccid quadriplegia, even when lab tests are inconclusive.

Area of Science:

  • Neurology
  • Cardiology
  • Internal Medicine

Background:

  • Acute flaccid quadriplegia is a critical neurological condition requiring prompt diagnosis.
  • Metabolic disturbances, such as electrolyte imbalances, can precipitate neurological symptoms.
  • Hypokalemia can manifest with significant neuromuscular and cardiac effects.

Observation:

  • A 28-year-old male presented with acute, ascending, bilateral, symmetrical, areflexic motor paralysis.
  • History included fever, vomiting, chloroquine use, and intravenous dextrose administration.
  • Initial laboratory results showed metabolic alkalosis with normal serum potassium levels.

Findings:

  • Electrocardiogram (ECG) revealed characteristic changes indicative of hypokalemia.
  • Despite normal serum potassium levels, ECG findings guided the diagnosis and management.

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Reproducable Paraplegia by Thoracic Aortic Occlusion in a Murine Model of Spinal Cord Ischemia-reperfusion

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  • The patient's condition improved successfully following management based on ECG findings.
  • Implications:

    • Highlights the critical role of ECG in diagnosing hypokalemia, especially when serum levels are misleading.
    • Emphasizes the importance of considering ECG in the workup of acute flaccid quadriplegia.
    • Underscores the potential for iatrogenic causes of electrolyte disturbances and paralysis.