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Electrocardiogram: his bundle potentials can be recorded noninvasively beat by beat on surface electrocardiogram
Gaopin Wang1, Renguang Liu2, Qinghua Chang1
1The Cardiovascular Institute of the First Affiliated Hospital of Liaoning Medical University, Renmin Street, Jinzhou, 121000, Liaoning Province, China.
BMC Cardiovascular Disorders
|March 17, 2017
Summary
Noninvasive recording of His bundle potentials on surface electrocardiograms is now possible. This new method may help locate atrioventricular block and identify wide QRS complex origins.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Imaging
Background:
- His bundle potentials are crucial for cardiac conduction but difficult to record noninvasively.
- Micro-wavelets preceding the QRS complex on surface ECGs may indicate atrioventricular conduction system activity.
- Current methods lack beat-to-beat His bundle potential recording on surface electrocardiograms.
Purpose of the Study:
- To explore the feasibility of noninvasively recording His bundle potentials using surface electrocardiograms.
- To evaluate a novel electrocardiogram technique for capturing His bundle activity.
- To compare noninvasive surface ECG measurements with invasive His bundle electrograms.
Main Methods:
- Sixty-five patients undergoing radiofrequency ablation for paroxysmal supraventricular tachycardia were randomized.
- Patients received either a conventional or a new surface electrocardiogram before the procedure.
- Comparative analysis of noninvasive PAs, AHs, HVs intervals and invasive PA, AH, HV intervals was performed.
Main Results:
- No significant difference was found between the HVs interval (49.63 ± 6.19 ms) and the invasive HV interval (49.35 ± 6.49 ms).
- A significant positive correlation (r=0.929, P<0.01) was observed between the noninvasive HVs interval and the invasive HV interval.
- The new electrocardiogram technique demonstrated reliability in measuring the HV interval.
Conclusions:
- His bundle potentials can be successfully recorded noninvasively on surface electrocardiograms.
- This noninvasive tracing method offers a potential new tool for diagnosing atrioventricular block.
- It may also aid in identifying the origin of wide QRS complex morphologies.
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