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The isopotential body surface atrial maps in healthy children of different age groups
Insights
Body surface potential mapping of P waves reveals distinct atrial excitation patterns in children. These findings aid in diagnosing atrial disorders, even when conventional ECG shows no abnormalities.
Area of Science:
- Cardiology
- Biophysics
- Pediatric Electrophysiology
Background:
- Atrial excitation patterns are crucial for understanding cardiac function.
- Body surface potential mapping offers a non-invasive method to assess electrical activity.
- Limited data exists on pediatric atrial electrophysiology using advanced mapping techniques.
Purpose of the Study:
- To investigate isopotential body surface maps of P waves in healthy children across different age groups.
- To compare pediatric atrial excitation patterns with those of adults.
- To evaluate the utility of P wave body surface mapping in detecting atrial septal defects (ASD) in children.
Main Methods:
- Utilized the ten-beat addition method for P wave analysis.
- Recorded isopotential body surface maps in 32 healthy children (divided into three age groups) and 12 children with ASD.
- Quantitatively analyzed duration, amplitude, and temporal shifts of anterior and left atrial maxima.
Main Results:
- In healthy children, the anterior P wave maximum consistently showed greater duration and amplitude than the left maximum, unlike adults.
- The youngest children exhibited the highest amplitude of the anterior maximum.
- Children with ASD demonstrated increased amplitude and duration of the anterior maximum compared to healthy controls, irrespective of age.
Conclusions:
- Body surface potential mapping of P waves reveals age-specific characteristics in pediatric atrial excitation.
- This technique can identify atrial abnormalities, such as those in ASD, even when standard ECG is inconclusive.
- P wave body surface mapping is a valuable diagnostic tool for pediatric atrial disorders.
Abstract:
Isopotential body surface maps during atrial excitation were examined by ten beats addition method of the P waves in 32 healthy children divided into three age groups. The moving pattern of the maxima and the minima, and the distribution of areas of positive and negative potentials in each group were similar to those of adults. Quantitative analysis of the duration and amplitude of the anterior and the left maximum, and the shift time from the former to the latter were done. In children the duration and amplitude of the anterior maximum were always larger than those of the left maximum in contrast to findings in adults where no significant difference was found in their values. The higher amplitude of the anterior maximum was found mainly in the youngest group. These parameters of the P maps were also examined in 12 cases of atrial septal defect (ASD). The amplitude and duration of the anterior maximum were larger than those of healthy children at each age group, although the P wave by the conventional ECG did not reveal signs of right atrial overload. These results suggest that the body surface maps of the P waves are useful diagnostic methods to detect atrial disorders in children.