Article

A predischarge submaximal exercise test is often recommended after acute
myocardial infarction (AMI) as part of phase I cardiac rehabilitation. In this
study, a submaximal exercise parameter, oxygen uptake efficiency slope (OUES),
was used to monitor the benefit of early mobilization within 48 h after AMI. An
early mobilization protocol within 48 h after AMI has been initiated since 1 September 2012 in our center. Patients with onset time of AMI within 1 year
before and 1 year after initiation of the early mobilization protocol were
recruited for comparisons.
Sixty patients were analyzed on the basis of this
criterion, and were subjected to predischarge submaximal exercise tests. The OUES
calculated with 100% exercise duration (OUES100) and calculated with the first
50% of exercise duration (OUES50) were obtained and analyzed. Both OUES100 and
OUES50 of the AMI patients with early mobilization were significantly higher than
those without early mobilization (P=0.025 and 0.007, respectively). The OUES100
and OUES50 were also highly correlated (r=0.891, P<0.001). The subgroup analysis
using patients within 3 months before and 3 months after initiation of the
protocol also showed a significant difference.
OUES could be used to measure the exercise capacity and monitor the effect of phase I cardiac rehabilitation in
patients soon after AMI. Early mobilization within 48 h following AMI significantly enhanced the patient's exercise capacity.

Langue : ANGLAIS