Arrhythmias & electrophysiology
Factors affecting electrogram sensing in an insertable cardiac monitor: Insights from surface electrocardiogram mapping analysis
Authors' conclusion
Longer vector length and oblique implant angle yielded the best electrogram sensing and are relevant considerations for ICM implantation procedures.
Study context
- Population
- Participants undergoing precordial single-lead surface electrocardiogram (ECG) mapping; subset of 50 with clinically indicated insertable cardiac monitor (ICM) implant (Reveal LINQ/BIOMONITOR III, 1:1)1,800 tracings
- Participants
- 150 participants
- Comparison
- ICM sensing vector length (75 vs 45 mm), vector angle and posture on surface ECG mapping
- Outcome
- P-wave amplitude (visibility threshold > 0.015 mV)
Methodological detailsblinded analysis
- Blinded analysis
Main finding
As reported in the abstract
P- and R-wave amplitude and P-wave visibility
P < 0.0001
- Median P-wave amplitude larger with 75 mm vs 45 mm vector length
- 45%
- Median R-wave amplitude larger with 75 mm vs 45 mm vector length
- 53%
Further findings
P-wave amplitude and visibility by BMI category
- Longer vector length improved P-wave amplitude and visibility in all BMI categories
Correlation of ICM electrogram vs surface ECG amplitudes
- P-wave intraclass correlation coefficient
- 0.74
- R-wave intraclass correlation coefficient
- 0.80
- Moderate correlation
Original publication
Factors affecting electrogram sensing in an insertable cardiac monitor: Insights from surface electrocardiogram mapping analysis. Heart Rhythm. Published 13 June 2023. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →