Comparisons of LV function and the aortic pressure parameters between each state.

Baseline = baseline condition; RVAP = right ventricular apical pacing; HR = heart rate; LVEDV = left ventricular end diastolic volume; LVESV = left ventricular end systolic volume; LVSV = left ventricular stroke volume; LVEF = left ventricular ejection fraction; CO = cardiac output; IVRT = left ventricular isovolumetric relaxation time; E = left ventricular early peak filling velocity; e′ = early diastolic velocity of mitral annulus; E/e′ = septal E/e′ ratio; AoDP = aortic diastolic pressure; AoSP = aortic systolic pressure; △P = aortic pulse pressure difference; T = aortic pressure upstroke time; △P/T = mean upstroke velocity of the aortic pressure; TAoDP = time from the onset of the QRS to the measure point of AoDP on the synchronous aortic pressure-time curve; TAoSP = time from the onset of the QRS to the measure point of AoSP on the synchronous aortic pressure-time curve.Results were expressed as mean ± SD with six data points collected in each analysis. The t values and the P values were given by comparing the results of the baseline with RVAP using paired Student’s t test. Statistical significance was defined as PP values