Related Experiment Video
Updated: Jan 11, 2026
04:45
Real-Time Electrocardiogram Monitoring During Treadmill Training in Mice
Published on: May 5, 2022
2.9K
Exercise-induced wide QRS complex tachycardia in a healthy middle-aged individual
Fanni Keresztfalvi-Nagy1, Christian Sticherling2
1Praxis Bachtanne, Bubendorf, Switzerland nfanni95@gmail.com.
BMJ Case Reports
|November 11, 2025
Summary
Idiopathic right ventricular outflow tract tachycardia (RVOT) is a heart rhythm disorder often triggered by exercise. Catheter ablation successfully treated a patient with this condition, resolving symptoms and restoring a normal heart rhythm.
Area of Science:
- Cardiology
- Electrophysiology
- Internal Medicine
Background:
- Idiopathic right ventricular outflow tract tachycardia (RVOT) of the Gallavardin type presents as repetitive monomorphic ventricular tachycardia.
- This condition typically occurs under adrenergic stimulation, often during physical exertion.
Purpose of the Study:
- To describe a typical presentation of idiopathic RVOT, Gallavardin type, in a healthy, physically active male.
- To illustrate the diagnostic and therapeutic pathway for exercise-induced RVOT.
Main Methods:
- A 12-lead Holter-ECG was used to record exercise-induced wide QRS-complex tachycardia.
- Echocardiogram excluded structural heart disease.
- Electrophysiological study and subsequent catheter ablation were performed after failed antiarrhythmic therapy.
Main Results:
- The patient experienced exercise-induced tachycardia with an inferior axis and left bundle branch block morphology, originating from the RVOT.
- Verapamil therapy was unsuccessful.
- Catheter ablation resulted in a successful outcome with the patient remaining asymptomatic.
Conclusions:
- Idiopathic RVOT (Gallavardin type) can manifest during intense physical exertion.
- Electrophysiological study and catheter ablation are effective treatment options for drug-refractory RVOT.
- Successful ablation leads to symptom resolution and improved quality of life.
More Related Videos
07:40Impact of High-intensity Interval Exercise and Moderate-Intensity Continuous Exercise on the Cardiac Troponin T Level at an Early Stage of Training
Published on: October 10, 2019
7.7K
07:26Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
Published on: October 17, 2018
21.2K
Related Concept Videos
01:29Dysrhythmias III: Characteristics of Dysrhythmias
404
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...
404
01:17Increased pulse rate
1.1K
Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
1.1K
01:29Electrocardiogram
5.3K
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...
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
5.3K
01:28Dysrhythmias II: Classification of Tachyarrhythmias
479
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...
479
01:18Dysrhythmias IV: Characteristics of Bradyarrhythmias
484
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...
484
01:29Disturbances in Heart Rhythm
2.5K
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...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
2.5K