Exhibit 99.22 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-K KEY PERFORMANCE FACTORS February 28, 2001 Expected B Maturity 11/15/2005 Blended Coupon 5.7473% Excess Protection Level 3 Month Average 4.93% February, 2001 7.50% January, 2001 6.91% December, 2000 0.36% Cash Yield 19.48% Investor Charge Offs 4.62% Base Rate 7.36% Over 30 Day Delinquency 5.13% Seller's Interest 8.26% Total Payment Rate 13.44% Total Principal Balance $57,174,868,500.05 Investor Participation Amount $750,000,000.00 Seller Participation Amount $4,724,177,938.56