Exhibit 99.25 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-E KEY PERFORMANCE FACTORS May 31, 1998 Expected B Maturity 4/15/02 Blended Coupon 5.7793% Excess Protection Level 3 Month Average 5.64% May, 1998 5.02% April, 1998 5.92% March, 1998 5.98% Cash Yield 17.97% Investor Charge Offs 5.01% Base Rate 7.94% Over 35 Day Delinquency 5.17% Seller's Interest 13.80% Total Payment Rate 13.68% Total Principal Balance $35,599,996,121.04 Investor Participation Amount $750,000,000.00 Seller Participation Amount $4,911,601,602.55