Sequential biventricular pacing improves regional contractility, longitudinal function and dyssynchrony in patients with heart failure and prolonged QRS

Table 2 Echocardiography and Tissue Doppler before device implantation (n = 21).

Variable (range)	Preoperative
Tissue Tracking, mm	4,2 ± 1,5 (2,2-6,9)
Systolic Maximal Velocity, cm/s	3,0 ± 0,7 (1,8-4,6)
AVO - SMV/SD, ms	40.9 ± 19.7 (19.7-107.2)
Tissue Synchronization Imaging, segments	4,8 ± 2,8 (0,9-8,0)
LVEDd, mm	69.1 ± 9.6 (54.8-88.7)
LVESd, mm	60,5 ± 11.2 (37,9-81,3)
EF, %	26,0 ± 7.5 (10,4-35,4)
LVEDVi, ml/m²	128,4 ± 51,6 (63,1-234,3)
LVESVi, ml/m²	100,2 ± 47,2 (57,3-202,0)

Mean ± SD. AVO Aortic Valve Opening, SMV = Systolic Maximal Velocity, LVEDd = left ventricular end diastolic diameter, LVESd = left ventricular end systolic diameter, EF = ejection fraction. EDVi = end diastolic volume index, ESVi = end systolic volume index.

ISSN: 1476-7120