Exhibit 99.18 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-H KEY PERFORMANCE FACTORS APRIL, 1999 Expected B Maturity 09/17/01 Blended Coupon 5.1374% Excess Protection Level 3 Month Average 5.99% April, 1999 5.18% March, 1999 6.73% February, 1999 6.06% Cash Yield 17.86% Investor Charge Offs 5.23% Base Rate 7.45% 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 $ 1,200,000,000.00 Seller Participation Amount $ 4,418,074,698.76