Exhibit 99.1 MBNA MASTER CREDIT CARD TRUST II SERIES 1994-A KEY PERFORMANCE FACTORS April 30, 1999 Expected B Maturity 9/15/99 Blended Coupon 5.1478% Excess Protection Level 3 Month Average 5.97% April, 1999 5.11% March, 1999 6.74% February, 1999 6.07% Cash Yield 17.83% Investor Charge Offs 5.23% Base Rate 7.49% Over 35 Day Delinquency 4.87% Seller's Interest 10.40% Total Payment Rate 14.17% Total Principal Balance $ 42,469,994,217.25 Investor Participation Amount $ 760,000,000.00 Seller Participation Amount $ 4,418,074,698.76