well there is this, however we are talking a refinance, and in that case you may have initially borrowed with a good LVR however the property has lost value. eg, some douchelord government has built a freeway next to your house, the neighbours have all decided to live like cops and bring the whole street down, you live in rural QLD or even worse, you bought in a minimg area and mining ceased etc etc
there's ya 100+ LVR right there.
I have a guy on 240 in my portfolio