Re: USB
First of all you should tell us in which format is available data from your device?
Some guys suggested you ICs which in fact are "bridges" between parallel port, serial port, ... and USB. They are not sand-alone devices.
This means that you will need to have "something" which will take data from your heart beat monitor meter (format of data unknown) and put it through to an IC with USB. This something can be a microcontroller or maybe your meter can just do it..?