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Dysrhythmias IV: Characteristics of Bradyarrhythmias

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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...

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Electrocardiogram

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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.
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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...

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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

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Syncope and intermittent Brugada ECG pattern.

Bruno Cordeiro Piçarra¹, Pedro Silva Cunha, Mário Oliveira

¹Hospital do Espírito Santo, Évora, Portugal. bcpicarra@hotmail.com

Revista Portuguesa De Cardiologia : Orgao Oficial Da Sociedade Portuguesa De Cardiologia = Portuguese Journal of Cardiology : an Official Journal of the Portuguese Society of Cardiology

|April 30, 2013

Summary

This summary is machine-generated.

Brugada syndrome, a rare cause of sudden death, can present with intermittent ECG changes. This case highlights diagnosis in a young man with syncope, leading to ICD implantation and successful ventricular fibrillation conversion.

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Area of Science:

Cardiology
Genetics

Background:

Brugada syndrome is a rare genetic disorder affecting ion channels, leading to ventricular arrhythmias and sudden cardiac death.
Its diagnosis can be challenging due to the intermittent nature of the characteristic electrocardiogram (ECG) pattern.

Observation:

A 32-year-old man presented with syncope, initially showing non-specific ECG changes.
Subsequent ECGs revealed a type 1 Brugada pattern, particularly during a respiratory infection.

Findings:

The patient underwent electrophysiological study, confirming the diagnosis.
An implantable cardioverter-defibrillator (ICD) was implanted for arrhythmia management.

Implications:

This case underscores the importance of serial ECG monitoring in diagnosing Brugada syndrome.
Early diagnosis and appropriate management, including ICD implantation, are crucial for preventing sudden cardiac death in affected individuals.