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Blood Pressure Imbalances and Circulatory Shock01:24

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Disorders affecting blood volume, vascular tone, or vascular function can disrupt vascular homeostasis, including conditions like hypertension, hemorrhage, and shock.
Blood Pressure: Hypertension and Hypotension
Normal blood pressure is 120/80 mm Hg. Elevated blood pressure is 120-129/under 80 mm Hg. Hypertension, warranting treatment at 130/80 mm Hg, is often asymptomatic and can lead to severe cardiovascular events, aneurysms, peripheral arterial disease, chronic renal disease, or cardiac...
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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...
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Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers01:22

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Class I antiarrhythmic drugs are used to treat various types of arrhythmias or irregular heart rhythms. These drugs block the sodium (Na+) channels in the cardiac cells, thereby affecting the movement of electrical impulses across the heart. Class I antiarrhythmic drugs are divided into three subgroups: Class IA, Class IB, and Class IC, each with distinct mechanisms of action and effects on the heart.
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Antihypertensive Drugs: Action of Calcium Channel Blockers01:18

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Calcium ions are essential to contract smooth muscle cells in blood vessels. They enter these cells through voltage-dependent calcium channels, specifically L-type calcium channels in the cell membrane. These L-type calcium channels are integral to the excitation-contraction coupling process in smooth muscle. When a stimulus is received by smooth muscle cells, their membrane depolarizes. This alteration in membrane potential instigates the opening of L-type calcium channels. As a result,...
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Pharmacologic intervention is crucial in treating cardiac arrest patients during ACLS or Advanced Cardiovascular Life Support. The ACLS algorithms guide the administration of specific drugs based on the patient's cardiac arrest rhythm, which includes pulseless ventricular tachycardia (VT), ventricular fibrillation (VF), asystole, and pulseless electrical activity (PEA).EpinephrineIndication: Epinephrine is the first-line drug for all cardiac arrest rhythms.Mechanism of Action: Epinephrine...
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While local anesthetics are generally safe and well-tolerated, they can occasionally cause adverse effects that vary in severity. Local anesthetics can induce toxicity at two distinct levels. They can either produce local effects through direct contact with the neural elements or be absorbed into the bloodstream from the injection site, leading to systemic effects.
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Related Experiment Video

Updated: May 3, 2026

Utilizing Percutaneous Ventricular Assist Devices in Acute Myocardial Infarction Complicated by Cardiogenic Shock
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Shock due to amlodipine overdose.

Vimal Upreti1, V R Ratheesh2, Pawan Dhull3

  • 1Department of Endocrinology, Command Hospital (Air Force), Bangalore, India.

Indian Journal of Critical Care Medicine : Peer-Reviewed, Official Publication of Indian Society of Critical Care Medicine
|February 7, 2014
PubMed
Summary
This summary is machine-generated.

Amlodipine overdose can cause severe hypotension and shock. Prompt supportive care and high-dose calcium infusion are effective treatments for amlodipine toxicity.

Keywords:
Amlodipinecalcium channel blockerhypotension

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Area of Science:

  • Cardiovascular Medicine
  • Clinical Toxicology

Background:

  • Amlodipine is a widely used calcium channel blocker for hypertension and angina.
  • Amlodipine toxicity is a significant cause of cardiovascular drug overdoses.
  • Overdoses can result in life-threatening hypotension and shock.

Observation:

  • A case of severe amlodipine overdose presented with profound hypotension.
  • The patient required aggressive supportive management.

Findings:

  • High-dose intravenous calcium infusion was administered to counteract the calcium channel blockade.
  • The patient's hypotension and shock were successfully reversed with this intervention.

Implications:

  • This case highlights the critical role of early and aggressive supportive care in amlodipine overdose.
  • Intravenous calcium infusion is a key therapeutic strategy for managing amlodipine toxicity.
  • Effective management can lead to favorable outcomes in severe amlodipine poisoning.