Exhibit 99.52 MBNA MASTER CREDIT CARD TRUST II SERIES 2001-B KEY PERFORMANCE FACTORS May 31, 2001 Expected B Maturity 3/15/11 Blended Coupon 4.6231% Excess Protection Level 3 Month Average N/A May, 2001 7.45% April, 2001 5.28% March, 2001 N/A Cash Yield19.67% Investor Charge Offs 5.45% Base Rate 6.76% Over 30 Day Delinquency 4.84% Seller's Interest 8.52% Total Payment Rate14.20% Total Principal Balance$58,203,705,030.43 Investor Participation Amount$750,000,000.00 Seller Participation Amount$4,958,014,468.94