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[Late ventricular potentials in patients without ventricular tachycardia 3 years after myocardial infarct]
P Vojtísek1, J Kvasnicka, T Tusl
1I. interní klinika FN Hradec Králové.
Insights
Late ventricular potentials were found in 24.6% of myocardial infarction survivors without sustained ventricular tachycardia. These potentials were more common after lower wall myocardial infarction, indicating potential risk stratification value.
Area of Science:
- Cardiology
- Electrophysiology
Context:
- Assessing risk stratification in myocardial infarction (MI) survivors is crucial for preventing sudden cardiac death.
- Late ventricular potentials (LVPs) are a potential marker for arrhythmogenic substrate post-MI.
Purpose:
- To investigate the incidence and characteristics of LVPs in patients who survived myocardial infarction without developing sustained ventricular tachycardia.
Summary:
- This study examined 57 patients 29-48 months post-MI who did not experience sustained ventricular tachycardia.
- LVPs were detected in 22.8% (25-250 Hz filter) and 24.6% (40-250 Hz filter) of patients.
- LVPs were significantly more frequent in patients with inferior wall MI compared to anterior wall MI (p<0.05).
- No significant differences in recurrent MI, heart failure, arrhythmias, or comorbidities were observed between LVP-positive and LVP-negative groups.
Impact:
- The findings suggest that LVPs may be a useful, albeit not universally present, indicator in specific post-MI populations.
- The higher incidence in inferior MI warrants further investigation for targeted risk assessment.
- These results align with existing literature on LVP prevalence in asymptomatic post-MI patients.
Abstract:
In 57 patients who in the course of 29-48 months (mean 36 months) after myocardial infarction did not develop sustained ventricular tachycardia, late ventricular potentials were investigated. Positive findings were revealed in 13 (22.8%) patients using a 25-250 Hz filter and in 14 patients resp. (24.6%) using a 40-250 Hz filter. Late ventricular potentials were significantly more frequent in patients after myocardial infarction of the lower rather than the anterior wall (p less than 0.05). No differences were revealed between groups with positive and negative late ventricular potentials as regards the occurrence of repeated infarction, left-side cardiac failure, ectopic ventricular contractions, diabetes mellitus, arterial hypertension and cardiothoracic index. The assembled data are comparable with data in the literature pertaining to the incidence of late ventricular potentials in patients after myocardial infarction without sustained ventricular tachycardia.