Exhibit 99.23 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-F KEY PERFORMANCE FACTORS April 30, 2000 Expected B Maturity 6/17/02 Blended Coupon 6.5913% Excess Protection Level 3 Month Average 5.94% April, 2000 5.56% March, 2000 6.01% February, 2000 6.26% Cash Yield 18.08% Investor Charge Offs 4.70% Base Rate 7.82% Over 30 Day Delinquency 4.72% Seller's Interest 10.74% Total Payment Rate 13.82% Total Principal Balance $52,271,464,953.72 Investor Participation Amount $706,000,000.00 Seller Participation Amount $5,612,664,435.23