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Aim The myocardial performance index (MPI), or Tei index, has been shown to be useful in the assessment of global myocardial performance. There are few invasive data however, which examine its load dependence or sensitivity to acute changes in contractile function. The purpose of this study was therefore to study formally the effect of clinically relevant changes in these parameters in an animal model. Methods and results We examined 10 Yorkshire pigs using echocardiographic assessment anddoi:10.1016/j.ehj.2004.07.034 pmid:15589642 fatcat:qk6pemvfbjad3lwpxjcnbfsxjq