Exhibit 99.1 MBNA MASTER CREDIT CARD TRUST II SERIES 1994-A KEY PERFORMANCE FACTORS May 31, 1999 Expected B Maturity 9/15/99 Blended Coupon 5.0886% Excess Protection Level 3 Month Average 6.50% May, 1999 7.65% April, 1999 5.11% March, 1999 6.74% Cash Yield 19.45% Investor Charge Offs 4.88% Base Rate 6.92% Over 30 Day Delinquency 4.89% Seller's Interest 6.97% Total Payment Rate 14.69% Total Principal Balance $ 41,914,776,221.36 Investor Participation Amount $ 760,000,000.00 Seller Participation Amount $ 2,922,256,702.87