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Related Concept Videos

Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

5.5K
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...
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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...
1.1K
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...
731
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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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...
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Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

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Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

845
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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Related Experiment Video

Updated: Apr 19, 2026

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
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Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation

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[Atrial fibrillation in athletes].

Agnieszka Komorowska, Paweł Ptaszyński, Marcin Rosiak

    Polski Merkuriusz Lekarski : Organ Polskiego Towarzystwa Lekarskiego
    |December 31, 2014
    PubMed
    Summary

    Intense exercise may increase atrial fibrillation (AF) risk in athletes, showing a U-shaped curve. While moderate activity is protective, high-intensity training warrants investigation for potential cardiac issues.

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    Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
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    Area of Science:

    • Cardiology
    • Sports Medicine
    • Electrophysiology

    Context:

    • Atrial fibrillation (AF) is a common arrhythmia, affecting 1-1.5% of the population.
    • While regular physical activity benefits cardiovascular health, intense exercise, particularly in elite athletes, is paradoxically linked to increased AF incidence.
    • Studies suggest a U-shaped relationship between physical activity levels and AF risk.

    Purpose:

    • To explore the multifactorial etiopathogenesis of AF in athletes.
    • To highlight the importance of investigating AF in athletes due to potential underlying cardiac conditions.
    • To discuss current treatment strategies for AF in this population.

    Summary:

    • The etiopathogenesis of AF in athletes is multifactorial, potentially involving cardiac remodeling, autonomic nervous system alterations, inflammation, and dyselectrolitaemia.
    • AF in athletes requires thorough investigation as it can be an early sign of structural heart disease or channelopathy, posing a risk of sudden cardiac death.
    • Atrial fibrillation ablation is increasingly the first-line treatment for athletes due to challenges with pharmacotherapy.

    Impact:

    • Provides insights into the complex relationship between exercise and atrial fibrillation.
    • Emphasizes the need for vigilance and further investigation of cardiac health in athletes experiencing arrhythmias.
    • Informs clinical practice regarding the management of AF in athletic populations, favoring ablation as a primary treatment.