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Related Concept Videos

Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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...
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 III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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 minute.
Patterns of Fever01:26

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Before understanding the types and patterns of fever, it is essential to know its phases.
Electrocardiogram01:29

Electrocardiogram

An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and the T...
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

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...

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Brugada-type electrocardiographic pattern induced by fever.

Ozcan Ozeke1, Dursun Aras, Bilal Geyik

  • 1Yuksek Ihtisas Hospital, Department of Cardiology, Ankara, Turkey. ozcanozeke@hotmail.com

Indian Pacing and Electrophysiology Journal
|September 1, 2006
PubMed
Summary

Fever can induce Brugada syndrome-like electrocardiographic changes due to temperature-dependent ionic shifts. These dynamic anomalies resolved as the patient's temperature normalized, highlighting a crucial link between fever and cardiac electrical activity.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Internal Medicine

Background:

  • Brugada syndrome is characterized by ST-segment elevation due to ionic current imbalance.
  • This ionic mechanism is known to be temperature-dependent.

Purpose of the Study:

  • To describe a case of dynamic electrocardiographic changes mimicking Brugada syndrome in a patient with fever.
  • To investigate the relationship between body temperature and these cardiac anomalies.

Main Methods:

  • Case report of a 33-year-old male patient.
  • Electrocardiographic monitoring during febrile illness and after temperature normalization.

Main Results:

  • The patient presented with fever and dynamic electrocardiographic changes resembling Brugada syndrome.
  • These anomalies resolved completely upon resolution of the fever and return to normal body temperature.

Conclusions:

  • Fever can unmask or induce Brugada syndrome-like electrocardiographic patterns.
  • Body temperature significantly influences the electrophysiological substrate underlying these cardiac findings.