Supraventricular Tachycardia Conversion as a Response in Ventricular Premature Complexes
Konstantinos Tampakis1, Evangelia-Erasmia Papakonstantinou1, Alexandros Sykiotis1
1Department of Electrophysiology & Pacing, Henry Dunant Hospital Center, Athens, Greece.
JACC. Case Reports
|July 4, 2025
Summary
Three cases of supraventricular tachycardia showed identical conversion patterns. Electrophysiology studies confirmed a consistent diagnosis and response to atrial activation and entrainment, suggesting a shared underlying mechanism for these tachycardias.
Area of Science:
- Cardiology
- Electrophysiology
- Cardiac Arrhythmias
Background:
- Supraventricular tachycardia (SVT) encompasses various rapid heart rhythms originating above the ventricles.
- Accurate diagnosis of SVT mechanisms is crucial for effective treatment and patient management.
Purpose of the Study:
- To investigate the underlying mechanism of supraventricular tachycardia in three patients with similar clinical presentations.
- To determine if electrophysiology study findings correlate with observed rhythm conversion patterns.
Main Methods:
- Case series analysis of three patients with supraventricular tachycardia.
- Electrophysiology study including atrial activation and entrainment mapping.
- Analysis of tachycardia termination modes and electrophysiological responses.
Main Results:
- All three cases demonstrated the same conversion mode of supraventricular tachycardia.
- Atrial activation successfully terminated tachycardia in one case.
- Entrainment maneuvers during electrophysiology study revealed consistent responses and confirmed the diagnosis across all three patients.
Conclusions:
- The consistent findings suggest a common underlying mechanism for the supraventricular tachycardias observed in these cases.
- Electrophysiology studies are valuable in elucidating the mechanisms of complex supraventricular tachycardias.
- Atrial activation and entrainment mapping provide critical diagnostic information.
Related Concept Videos
01:29Dysrhythmias III: Characteristics of Dysrhythmias
128
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...
128
01:25ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
170
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...
170
01:28Dysrhythmias II: Classification of Tachyarrhythmias
140
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...
140
01:18Dysrhythmias IV: Characteristics of Bradyarrhythmias
123
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...
123
01:29Disturbances in Heart Rhythm
1.3K
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...
1.3K
01:30Dysrhythmias V: Evaluating Dysrhythmias
122
Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
122