Table 2.

Results

Parameter	LVAT95, ms	RVAT95, ms	QRSd, ms
All patients (n = 20)
Δ S-HBP → NS-HBP	-5.5 (-0.6 to -10.4) P = .030∗	4.3 (-4.0 to 12.8) P = .296	22.1 (11.8 to 32.4) P = .0003
Patients with narrow QRS (n = 6)
Δ S-HBP → NS-HBP	-2.9 (-9.7 to 4.0) P = .331	+16.8 (-5.3 to 38.9) P = .108	+31.4 (22.0 to 40.7) P = .0003
Δ Intrinsic → S-HBP	+4.5 (-2.2 to 11.3) P = .143	-2.9 (-9.6 to 3.7) P = .306	+5.4 (0.6 to 10.2) P = .034

Values are mean, 95% CI, P value. P values are for superiority 2-tailed paired t tests. Δ S-HBP → NS-HBP is the within-patient change in parameter value from S-HBP to NS-HBP. Δ Intrinsic → S-HBP is the within-patient change in parameter value from intrinsic to S-HBP.

LVAT₉₅ = left ventricular activation time of 95% of activations; NS-HBP = nonselective His bundle pacing; QRSd = QRS duration; RVAT₉₅ = right ventricular activation time of 95% of activations; S-HBP = selective His bundle pacing.

^∗This is the superiority P value; noninferiority P value is in main text.