Exhibit 99.53 MBNA MASTER CREDIT CARD TRUST II SERIES 2001-B KEY PERFORMANCE FACTORS April 30, 2001 Expected B Maturity 3/15/11 Blended Coupon 5.5875% Excess Protection Level 3 Month Average N/A April, 2001 5.28% March, 2001 N/A February, 2001 N/A Cash Yield19.94% Investor Charge Offs 5.50% Base Rate 9.16% Over 30 Day Delinquency 4.89% Seller's Interest 9.33% Total Payment Rate13.70% Total Principal Balance$58,171,313,434.78 Investor Participation Amount$750,000,000.00 Seller Participation Amount$5,425,622,873.29 For purpose of calculating the Base Rate and Excess Protection Level, a Coupon of 7.16% (53/360) was used. The Base Rate was calculated using a 53 day monthly period, 3/8/01 to 4/30/01.