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Related Concept Videos

Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
238
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

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Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
253
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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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...
1.9K
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

310
Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
310
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

298
Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
298
Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

213
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...
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A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts
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Diathermy-induced Ventricular Fibrillation.

Sanoj Chacko1, Saud B Haseeb2, Sohaib Haseeb1

  • 1Heart Rhythm Service, Queen's University, Kingston, Ontario, Canada.

The Journal of Innovations in Cardiac Rhythm Management
|March 3, 2021
PubMed
Summary
This summary is machine-generated.

Diathermy use during cardiac device extraction can cause fatal ventricular fibrillation. A defibrillation facility is crucial during pacemaker revisions involving diathermy to manage potential life-threatening arrhythmias.

Keywords:
Defibrillationdiathermyventricular fibrillation

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Device Technology

Background:

  • Diathermy is a common surgical tool used for hemostasis during intracardiac device procedures.
  • While beneficial for bleeding control, diathermy carries a rare risk of inducing cardiac arrhythmias.

Observation:

  • A case of ventricular fibrillation was observed during a device extraction procedure utilizing diathermy.
  • The patient experienced a potentially fatal cardiac event directly linked to the diathermy application.

Findings:

  • Diathermy energy delivery during intracardiac device extraction can precipitate life-threatening ventricular fibrillation.
  • This adverse event underscores the inherent risks associated with diathermy in electrophysiology procedures.

Implications:

  • Pacemaker revisions and other intracardiac device procedures requiring diathermy necessitate immediate availability of defibrillation equipment.
  • Enhanced safety protocols are recommended for diathermy use in patients with implanted cardiac devices to prevent sudden cardiac arrest.