mean heart period variability ( +/- sem ) was significantly lower ( p less than 0.05 ) in the heart failure groups ( 22 +/- 3 ms for medicated and 17 +/- 3 ms for nonmedicated ) than in the transplant patients ( 41 +/- 5 ms ) or control subjects ( 58 +/- 5 ms ) .
C0018787
heart
C0018801
heart failure