Key result
Inter-atrial and inter-ventricular electromechanical delays can be predicted from P-wave (R=0.94, P<0.0001) and QRS durations (R=0.87, P=0.002), allowing AV delay optimization without echo.
Why the study?
Can surface ECG P-wave and QRS durations predict echo-Doppler electromechanical delays in patients with DDD pacemakers?
Cross-Sectional (n=36)
Can surface ECG P-wave and QRS durations predict echo-Doppler electromechanical delays in patients with DDD pacemakers?
Effect estimate: R = 0.94 for ATD; R = 0.87 for IVD
p-value: p=<0.0001
Surface ECG P-wave and QRS durations can accurately predict interatrial and interventricular electromechanical delays, potentially allowing for pacemaker AV delay optimization without the need for echocardiography.
No takes yet. Share an insight, caveat, or question.
May support noninvasive AV optimization in DDD pacemakers; hypothesis-generating and requires prospective validation.
Chirife et al. (2008) conducted a cross-sectional in Previously implanted DDD pacemakers (n=36). P-wave and QRS duration measurements vs. Echo-Doppler measurements was evaluated on Correlation between ECG intervals (P-wave, QRS) and echo-Doppler electromechanical delays (ATD, IVD) (R = 0.94 for ATD; R = 0.87 for IVD, p=<0.0001). Inter-atrial and inter-ventricular electromechanical delays can be predicted from P-wave (R=0.94, P<0.0001) and QRS durations (R=0.87, P=0.002), allowing AV delay optimization without echo.
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