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Table 3 Effect of Echocardiography Guided Biventricular Pacemaker Optimization on Cardiac Hemodynamics and Radial Artery Tonometry Derived PEP in NYHA Class I and II (Group I) vs. Class III and IV (Group II) Patients

From: Pre-ejection period by radial artery tonometry supplements echo doppler findings during biventricular pacemaker optimization

 

Parameter

Baseline

Post Opt

P value

Δ%

Group I

LV-VTI

16.8 ± 3.8

18.5 ± 4.1*

0.001

11.3

Group II

LV-VTI

15 ± 5.6

18.3 ± 6.1*

< 0.001

24†

Group I

LV-ET

298.8 ± 36.4

311.3 ± 30.9*

< 0.001

4.6

Group II

LV-ET

275.5 ± 35.3

287.5 ± 34.7*

< 0.001

4.5

Group I

FT

403.7 ± 84.2

420.8 ± 53.2

0.24

6.8

Group II

FT

440.2 ± 105.5

449 ± 100.8

0.33

2.8

Group I

MPI

0.57 ± 0.2

0.45 ± 0.15*

< 0.001

-19.6

Group II

MPI

0.58 ± 0.18

0.45 ± 0.12*

< 0.001

-19.5

Group I

MR

1.4 ± 1.1

1 ± 0.9*

0.02

-13.7

Group II

MR

1.6 ± 1.1

1.2 ± 0.9*

0.02

-22

Group I

PAP

39.5 ± 10.1

33.1 ± 9.9*

< 0.001

-17.6

Group II

PAP

52.3 ± 7.2†

42.3 ± 9*

< 0.001

-19.4

Group I

PEP

235 ± 34

234 ± 42

0.48

-0.6

Group II

PEP

258 ± 35

236 ± 30

< 0.001

-8.2†

  1. Gp I, n = 18, Gp II, n = 19,*p < 0.05 vs. baseline; †p < 0.05 vs. group I; Δ% = Difference% = (Post Optimization-Baseline)/Baseline; LV-VTI (cm) = Left Ventricular Velocity Time Integral; ET (ms) = Left Ventricular Ejection Time; FT (ms) = Left Ventricular Filling Time; MPI = Myocardial Performance Index; MR = Mitral Regurgitation; PAP (mmHg) = Pulmonary Artery Pressure; PEP = Pre-Ejection Time (ms). MR Grade: 0 = None; 0.5 = Trace; 1 = Mild; 1.5 = Mild to Moderate; 2 = Moderate. P = 0.06 for E wave and 0.08 for DT vs. baseline.