What time interval do I need to set for the calculation of the mean pressure value on the cath lab system?
It is important to set the time interval for calculation of the mean pressure signal from the cath lab pressure transducer to one second or one heart beat (to measure proximal coronary pressure and possibly also femoral artery pressure if an extra transducer is available). This adjustment can generally be made very easily in the software of a modern system. Older systems may require manual adjustment by the supplier of that equipment. Note that some systems are set with mean pressure averaged over ten seconds or more. This is especially critical during i.c. drug administration. If the mean time interval was greater than 10 seconds and the operator was not aware of this, it could severely mask the reduction in distal pressure – leading potentially to a significant lesion being mistakenly evaluated as nonsignificant!
Related Questions
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