The onset of cardiac pathology can be predicted by first acquiring a plurality of lead values as a function of time for set of electrocardiogram leads and defining a spatial curve from the lead values for at least three leads. The light beam is received at a wavelength spectral distribution module and is separated into light beam segments corresponding to at least two different wavelengths in a first selected direction transverse to beam propagation direction. The locking mechanism includes a handle, a sheave attached to an end of the handle, and a bias spring connected between the mounting bracket and the handle, the spring biasing the handle so that the sheave extends through an elongated opening in the channel to engage the moveable shaft in order to prevent further sliding movement through the channel. Shunt interconnections are formed in the horizontal direction and in the vertical direction above the transfer layers.