Key result
Body surface potential mapping demonstrated a statistically significant opposite polarity between the P wave and the PQ segment isointegral maps in 80% of cases.
Why the study?
Does body surface potential mapping reveal opposite polarity of the PQ segment compared to the P wave in healthy controls and patients with cardiovascular disease?
Cross-Sectional (n=83)
Does body surface potential mapping reveal opposite polarity of the PQ segment compared to the P wave in healthy controls and patients with cardiovascular disease?
p-value: p=<0.05
Body surface potential mapping demonstrates that the PQ segment has an opposite polarity to the P wave, with extrema occurring in areas not examined by standard chest leads, which may have diagnostic implications.
Opposite P-PQ polarity on body surface mapping warrants clinical caution; leaves open diagnostic utility beyond standard ECG leads.
The aim of our work was to study the opposite polarity of the PQ segment to the P wave body surface potential maps in different groups of patients. We constructed isointegral maps (IIM) in 26 healthy controls (C), 16 hypertensives (HT), 26 patients with arterial hypertension and left ventricular hypertrophy (LVH) and 15 patients with myocardial infarction (MI). We analyzed values and positions of map extrema and compared the polarity of maps using the correlation coefficient. The IIM P maxima appeared mainly over the precordium, the minima mainly in the right subclavicular area. The highest maxima were in the MI group, being significantly higher than in the HT and LVH groups. No differences concerning any values of other extrema were significant. The IIM PQ maxima were distributed over the upper half of the chest; the minima mainly over the middle sternum. A statistically significant opposite polarity between the IIM P and IIM PQ was found in 80 % of cases. The opposite polarity of the P wave and the PQ segment was proved in isointegral body surface maps. The extrema occurred in areas not examined by the standard chest leads. This has to be considered for diagnostic purposes.
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Kozlíková et al. (2011) conducted a cross-sectional in Arterial hypertension, left ventricular hypertrophy, myocardial infarction (n=83). Body surface potential mapping was evaluated on Statistically significant opposite polarity between P wave and PQ segment isointegral maps (p=<0.05). Body surface potential mapping demonstrated a statistically significant opposite polarity between the P wave and the PQ segment isointegral maps in 80% of cases.
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