Table 4

Exercise data

VariableControlsIschaemicIdiopathic
Exercise time (s)952 (106)503 (89)4-165 722 (117)4-165 ††
mV˙o 2 (ml/kg/min)31.5 (4.6)18.6 (3.9)4-165 25.0 (4.9)** ††
e/V˙co225.5 (3.8)35.8 (5.3)4-165 31.1 (4.7)*
Anaerobic threshold (ml/kg/min)14.0 (4.1)11.3 (3.3)13.1 (3.4)
RQ1.27 (0.13)1.18 (0.11)1.19 (0.09)
Resting heart rate (beats/min)66 (9)83 (20)** 88 (10)**
Peak heart rate (beats/min)168 (20)144 (25)** 167 (12)
Change in heart rate (beats/min)102 (15)61 (12)4-165 79 (14)4-165 ††
  • Values are mean (SD). mV˙o2, peak oxygen consumption; RQ, ratio of carbon dioxide production to oxygen consumption at peak exercise;V˙e/V˙co 2, regression slope of ventilation rate against carbon dioxide production during exercise.

  • 4-165 p<0.001, **p<0.01, *p<0.05 v controls;†† p<0.001, ††p<0.01, p<0.05 v ischaemic group.