Exhibit 99.25 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-E KEY PERFORMANCE FACTORS February 28, 1999 Expected B Maturity 4/15/02 Blended Coupon 5.1473% Excess Protection Level 3 Month Average 5.99% February, 1999 6.06% January, 1999 5.81% December, 1998 6.12% Cash Yield 17.84% Investor Charge Offs 5.13% Base Rate 6.65% Over 35 Day Delinquency 5.38% Seller's Interest 9.80% Total Payment Rate 13.67% Total Principal Balance $40,800,539,305.60 Investor Participation Amount $750,000,000.00 Seller Participation Amount $3,998,619,787.11