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Related Concept Videos

Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Dysrhythmias I: Introduction01:15

Dysrhythmias I: Introduction

Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...
Cardiopulmonary Resuscitation IV: Pharmacological Management01:25

Cardiopulmonary Resuscitation IV: Pharmacological Management

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...
Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
Cardiomyopathy VII: Pre and Post Operative Nursing Management01:28

Cardiomyopathy VII: Pre and Post Operative Nursing Management

Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...

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Related Experiment Video

Updated: May 27, 2026

Programmed Electrical Stimulation in Mice
07:29

Programmed Electrical Stimulation in Mice

Published on: May 26, 2010

Cardiac dysrhythmias and anesthesia.

Michelle Nacur Lorentz1, Bruna Silviano Brandão Vianna

  • 1Universidade Federal de Minas Gerais, Brazil. mnacur@yahoo.com.br

Revista Brasileira De Anestesiologia
|November 9, 2011
PubMed
Summary

Anesthesiologists should understand perioperative cardiac dysrhythmias and their causes. Proper knowledge aids in avoiding unnecessary treatments and managing these common arrhythmias effectively.

Area of Science:

  • Anesthesiology
  • Cardiology

Background:

  • Cardiac dysrhythmias are frequent during the perioperative period.
  • Anesthesiologists must be prepared to diagnose and manage these events.
  • Understanding drug-induced dysrhythmias is crucial.

Purpose of the Study:

  • To review key aspects of perioperative cardiac dysrhythmias.
  • To explore the relationship between perioperative drugs and dysrhythmias.
  • To provide guidance for anesthesiologists.

Main Methods:

  • Literature review of cardiac dysrhythmias in the perioperative setting.
  • Analysis of mechanisms, causative drugs, diagnosis, and treatment.
  • Focus on the anesthesiologist's role.

Main Results:

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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

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Electrocardiogram Recordings in Anesthetized Mice using Lead II
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Electrocardiogram Recordings in Anesthetized Mice using Lead II

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Related Experiment Videos

Last Updated: May 27, 2026

Programmed Electrical Stimulation in Mice
07:29

Programmed Electrical Stimulation in Mice

Published on: May 26, 2010

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
08:28

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

Published on: April 5, 2011

Electrocardiogram Recordings in Anesthetized Mice using Lead II
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Electrocardiogram Recordings in Anesthetized Mice using Lead II

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  • Perioperative dysrhythmias often do not necessitate treatment.
  • Inappropriate treatment can lead to iatrogenic complications.
  • Identifying triggering factors is essential for appropriate management.

Conclusions:

  • Knowledge of dysrhythmias and triggers improves perioperative care.
  • Avoidance of incorrect or unnecessary treatments is paramount.
  • Effective management relies on comprehensive understanding and clinical judgment.