Related Experiment Videos
[Occurrence of repetitive ventricular responses in programmed right ventricular stimulation]
Zeitschrift Fur Die Gesamte Innere Medizin Und Ihre Grenzgebiete
|September 15, 1982
Summary
Programmed stimulation in 30 patients revealed that while V3 phenomenon is physiological, apical torsades indicate ventricular electric instability, especially with intraventricular reentry. This helps assess myocardial electric conditions.
Area of Science:
- Electrophysiology
- Cardiology
Context:
- Assessing ventricular myocardial electric instability is crucial for understanding various heart rhythm disturbances.
- Programmed electrical stimulation is a key diagnostic tool in electrophysiology.
Purpose:
- To evaluate the occurrence of repetitive ventricular responses, including the V3 phenomenon and apical torsades, during programmed right ventricular stimulation.
- To correlate these electrophysiological findings with ventricular electric instability in patients with rhythm disturbances.
Summary:
- Thirty patients with rhythm disturbances underwent programmed right ventricular stimulation.
- The V3 phenomenon (interventricular reentry) was evoked in 14 patients.
- Apical torsades, linked to intraventricular reentry and ventricular tachycardia, were observed in 6 patients with myocardial scar or bradycardia, indicating electric instability.
Impact:
- The study highlights that apical torsades, particularly when transitioning into intraventricular reentry, are significant indicators of ventricular electric instability.
- The presence or absence of inducible apical torsades, along with V3 phenomenon, provides insights into the conditions necessary for reentry mechanisms.
- Findings contribute to a better understanding of electrophysiological markers for myocardial electric instability in patients with arrhythmias.