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Late potentials in idiopathic dilated cardiomyopathy.
G Iannucci1, M Villani, N Alessandri
1IV Clinica Medica, Università degli Studi La Sapienza di Roma.
Giornale Italiano Di Cardiologia
|June 1, 1990
Summary
Late ventricular potentials indicate a higher risk of ventricular tachycardia in idiopathic dilated cardiomyopathy patients. However, their role in predicting sudden cardiac death remains uncertain.
Area of Science:
- Cardiology
- Electrophysiology
Background:
- Idiopathic dilated cardiomyopathy (IDCM) is a significant cause of heart failure.
- Identifying patients at risk for ventricular tachycardia (VT) and sudden cardiac death (SCD) is crucial for management.
Purpose of the Study:
- To investigate the role of late ventricular potentials (LVPs) as potential markers for VT and SCD in IDCM patients.
- To assess the correlation between LVPs, ejection fraction, and clinical outcomes.
Main Methods:
- Twenty-five IDCM patients underwent Holter monitoring and analysis of LVPs.
- Patients were categorized based on the presence of VT and LVPs.
- Follow-up data included heart transplantation, pacemaker implantation, and mortality.
Main Results:
- VT was detected in 9 patients, all exhibiting LVPs (mean length 37.22 ms, mean voltage 5.62 µV).
- LVPs were found in only 2 of 16 patients without VT.
- No significant differences in ejection fraction were observed between groups.
- Sensitivity, specificity, and predictive accuracy for VT were 100%, 87%, and 81%, respectively.
Conclusions:
- Late ventricular potentials are strong indicators of susceptibility to ventricular tachycardia in patients with idiopathic dilated cardiomyopathy.
- The prognostic value of LVPs for sudden cardiac death in this population requires further investigation.