Table 1: Baseline patient and ECG characteristics All patients (n=50) SDL group (n=23) LLL group (n=27) p-value*
Baseline patient characteristics
Age, yrs 70 ±14.1 72 ±10.9 68 ±16.3 0.640
Female gender, n (%) Arterial hypertension, n (%) Coronary artery disease, n (%) Left ventricular ejection fraction, % 22 (44) 29 (58) 12 (24) 53 ±13.7 6 (26) 15 (65) 9 (39) 53 ±13.4 16 (59) 14 (52) 3 (11) 53 ±14.3 0.024 0.398 0.044 0.732
Pacing indication
Sinus node disease, n (%) 8 (16) 5 (22) 3 (11) 0.480
Atrioventricular block, n (%) 30 (60) 12 (52) 18 (67) 0.754
Heart failure, n (%) 12 (24) 6 (26) 6 (22) 0.754
His bundle pacing failure, n (%) 12 (24) 5 (22) 7 (26) 1.000
Baseline ECG characteristics
Sinus rhythm, n (%) 27 (54) 12 (52) 15 (56) 1.000
QRS duration, ms LBBB, n (%) RBBB, n (%) IVCD, n (%) 127 ±33.1 8 (16) 7 (14) 2 (4) 124 ±36.9 3 (13) 3 (13) 0 (0) 128 ±30.9 5 (19) 4 (15) 2 (7) 0.634 0.711 1.000 0.493