Where, as above, C is annuity payment, PV is principal, n is number of payments, starting at end of first period, and i is interest rate per period. Equivalently C is the periodic loan repayment for a loan of PV extending over n periods at interest rate, i.
Refractory epilepsy is a seizure disorder that resists drug treatment. There is some debate among clinicians and researchers about how to define refractory epilepsy. As a result, this term is used in a variety of ways, and when a patient's epilepsy is described as refractory, resistant, or nonresponsive, it can be advisable to ask for more detail about what the diagnosis means.
A Answers (1) Follow Following Unfollow Pending Disabled. A Honor Society of Nursing (STTI) answered. Refractory hairy cell leukemia is a term used to refer to a case of the disease that doesn't respond to treatment. This is different from relapsed hairy cell leukemia, which is a case of the disease in which treatment was initially successful but symptoms returned in time.