Wednesday, March 26, 2008

From the archives of Science magazine

A remarkable confluence of interests:The second article is a classic by D. MacKay.

1 comment:

kenny g said...

Totally begs the question - which article were you actually looking up?

The QRS complex, for those interested, is the large triphasic waveform of the EKG (may appear diphasic due to a small initial depolarization, or Q wave, or monophasic if the S wave is absent). The exact appearance of the wave depends on the leads from which the trace is taken.

The QRS wave represents ventricular depolarization; it's the largest peak because the ventricles have the most mass and produce the largest electrical dipole. A notch in the peak - as seen in the FA deprived rats - likely reflects altered electrical conduction, possibly in the conductive Bundle of His.