Key result
In patients with LBBB undergoing His bundle pacing, a QS pattern in lead V1 (PPV 94.1%) or an rS pattern with descending/ascending S wave duration ratio >=0.64 (PPV 100%) predicted QRS correction.
Why the study?
Permanent His bundle pacing is an alternative to traditional CRT, but it cannot always correct LBBB, prompting the assessment of electrocardiographic patterns that can predict response.
Do specific baseline electrocardiographic patterns predict QRS narrowing with His bundle pacing in patients with LBBB and CRT indication?
Observational (n=70)
Do specific baseline electrocardiographic patterns predict QRS narrowing with His bundle pacing in patients with LBBB and CRT indication?
Baseline electrocardiographic patterns in lead V1 (QS pattern or an rS pattern with a descending/ascending S wave duration ratio ≥0.64) can strongly predict successful LBBB correction with His bundle pacing.
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ECG patterns in V1 may predict successful His bundle pacing in LBBB; hypothesis-generating for improved CRT selection pending randomized confirmation.
Moriña‐Vázquez et al. (2020) conducted an observational in Left bundle branch block (LBBB) with CRT indication (n=70). Permanent His bundle pacing (p-HBP) was evaluated on Electrocardiographic response (QRS narrowing) / correction of LBBB. In patients with LBBB undergoing His bundle pacing, a QS pattern in lead V1 (PPV 94.1%) or an rS pattern with descending/ascending S wave duration ratio >=0.64 (PPV 100%) predicted QRS correction.
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