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Table 3 Significant determinants of the sensor second heart sound (S2) amplitude values

From: Arterial pressure changes monitoring with a new precordial noninvasive sensor

  Rest S2 Peak S2 S2 Δ % rest-peak
Age (yrs) -.359 (<.01) -.476 (<.01) -.153 (<.05)
BSA (m2)    
LVMI (g/m2) -.194 (<.05)   
LV EF %   .215 (<.01)  
WMSI    
HR (bpm) .206 (<.01) .516 (<.01) .453 (<.01)
Diastolic Blood Pressure (mmHg) .183 (<.05) .319 (<.01) .502 (<.01)
Systolic Blood Pressure (mmHg)   .338 (<.01) .544 (<.01)
Mean Blood Pressure (mmHg)   .345 (<.01) .567 (<.01)
Ventricular elastance (mmHg/mL/m2)   .144 (<.05) .218 (<.01)
Arterial elastance   .307 (<.01) .281 (<.01)
SVR (dyne * sec * cm-5)    
Arterial compliance (mL *m-2/mmHg)   -.340 (<.01) -.300 (<.01)
Ventricular/arterial coupling    
Cardiac index .153 (<.05) .432 (<.01) .388 (<.01)
  1. Linear regression analysis to identify significant relationship between predictor variables (first column) and the sensor second heart sound (S2) amplitude was performed for baseline (second column) peak stress (third column) and rest-peak delta values (fourth column).
  2. Pearson's correlation coefficients (and significance value within brackets) are reported in cells with significant (p < 0.05) relationships.