Rapid ventricular pacing protects the myocardium against infarction via nonischemic KATP+ channel activation. Continued activation of KATP+ channels does not appear mandatory for the protection that is still present 15 minutes after cessation of pacing.
The Deltatrac II MBM-200 metabolic monitor appears accurate for low levels of V(O2) and V(CO2) during mechanical ventilation with F(IO2) levels up to 0.390. With increasing F(IO2) to 0.558, the increase in deviation of V(O2) for single measurements can be of clinical relevance for mechanically ventilated infants and children. The increased fluctuation of delivered F(IO2) on higher levels of F(IO2) is likely the cause of the inaccuracy.
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