Exhibit 99.25 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-E KEY PERFORMANCE FACTORS February 28, 1998 Expected B Maturity 4/15/02 Blended Coupon 5.7203% Excess Protection Level 3 Month Average 5.07% February, 1998 4.77% January, 1998 4.90% December, 1997 5.55% Cash Yield 16.77% Investor Charge Offs 4.83% Base Rate 7.16% Over 35 Day Delinquency 5.04% Seller's Interest 15.07% Total Payment Rate 12.54% Total Principal Balance $34,488,564,555.67 Investor Participation Amount $750,000,000.00 Seller Participation Amount $5,197,230,037.18