Assessment of P-wave duration and dispersion in patients with isolated coronary artery ectasia
Insights
Isolated coronary artery ectasia (CAE) is linked to longer P-wave duration and dispersion. This suggests CAE may impact atrial electrical activity, with severity correlating to P-wave changes.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Research
Background:
- Coronary artery ectasia (CAE) involves abnormal widening of coronary arteries.
- The study investigated if isolated CAE affects P-wave duration and dispersion (PD).
Discussion:
- Patients with isolated CAE showed significantly prolonged maximal P-wave duration (Pmax) and PD compared to controls.
- A strong correlation exists between Pmax, PD, and the number of ectatic segments/vessels.
Key Insights:
- Isolated CAE is associated with prolonged P-wave duration and dispersion.
- The degree of coronary ectasia correlates with the extent of P-wave abnormalities.
- CAE may influence atrial electrical conduction.
Outlook:
- Further research is needed to understand the clinical implications of these electrophysiological changes in CAE patients.
- Investigating the mechanisms linking CAE to atrial electrical alterations is crucial.
- Exploring potential therapeutic strategies targeting these changes could be beneficial.
Introduction:
Coronary artery ectasia (CAE) is defined as localized or diffuse dilatation of the epicardial coronary arteries. We sought to determine whether isolated CAE may alter P-wave duration and dispersion (PD).
Methods:
The study population consisted of 26 patients (mean age: 61.6+/-11.0 years) with isolated CAE (group 1) and sex- and age-matched 26 control subjects (group 2). Both groups underwent a standard 12-lead surface electrocardiogram recorded at 50 mm/s. Maximal (P(max)) and minimal P-wave durations (P(min)) are measured. PD was defined as the difference between P(max) and P(min).
Results:
In group 1, P(max) (114.2+/-10.4 ms vs 104.8+/-10.6 ms, p<0.002) and PD (34.0+/-12.7 ms vs 24+/-10.6, p<0.004) were significantly higher than those of group 2. Moreover a significant correlation was found between P(max) and PD with ectatic segment number (r=0.625, r=0.626, respectively; p=<0.001); and P(max) and PD with ectatic vessel number (r=0.698, r=0.704 respectively; p=<0.0001).
Conclusion:
Isolated CAE and the degree of the ectasia were found to be associated with prolonged P(max) and PD.
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