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. Author manuscript; available in PMC: 2013 Aug 1.
Published in final edited form as: Am Heart J. 2008 Aug 27;156(5):982–988. doi: 10.1016/j.ahj.2008.06.024

Figure 3.

Figure 3

Kaplan-Meier analysis for combined LVEF, NYHA class, resting PETCO2 and VE/VCO2 slope thresholds

Group Characteristics* Subjects meeting criteria Major Cardiac Events Percent Event Free
A No negative resting values and positive VE/VCO2 slope 65 5 92.3%
B 1 Negative Resting Value or Negative VE/VCO2 slope 136 38 74.0%
C 2 Negative Resting Values and Positive VE/VCO2 slope or 1 Negative Resting Value and Negative VE/VCO2 slope 108 44 59.3%
D 3 Negative Resting Values and Negative VE/VCO2 slope 30 17 43.3%
Log rank: 40.5, p<0.001
*
Negative Values:
  • Resting PETCO2: ≤33 mmHg
  • NYHA Class: III/IV
  • LVEF: ≤25%
  • VE/VCO2 Slope:≥36.0