Exhibit 99.27 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-I KEY PERFORMANCE FACTORS April 30, 1999 Expected B Maturity 8/16/04 Blended Coupon 6.3786% Excess Protection Level 3 Month Average 6.04% April, 1999 5.22% March, 1999 6.78% February, 1999 6.11% Cash Yield17.83% Investor Charge Offs 5.23% Base Rate 7.38% Over 35 Day Delinquency 4.87% Seller's Interest10.40% Total Payment Rate14.17% Total Principal Balance$42,469,994,217.25 Investor Participation Amount$750,000,000.00 Seller Participation Amount$4,418,074,698.76