Table 4

Sensitivity and Specificity for 10% Rise in LV-dP/dtmax for LV Pacing and Standard Echocardiographic Measures of Dyssynchrony Predicting 15% Reduction in ESV

Assessment MethodCutoff Met?Totaln%SensitivitySpecificityp Value
% rise LV-dP/dtmax ≥10%, n = 322Yes2217770.940.64<0.001
No10110
LVPE ≥140 ms, n = 31Yes2114670.820.50.06
No10330
IVMD ≥40 ms, n = 31Yes1513860.760.86<0.001
No16425
TDI septal lateral ≥80 ms, n = 32Yes84500.220.710.7
No241456
SDI ≥10.3%, n = 26Yes1612750.80.640.02
No10330

ESV = end-systolic volume; IVMD = interventricular mechanical delay; LV-dP/dtmax = maximum rate of left ventricular pressure; LVPE = left ventricular pre-ejection time; SDI = systolic dyssynchrony index; TDI = tissue Doppler imaging.