Exhibit 99.18 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-H KEY PERFORMANCE FACTORS SEPTEMBER, 1998 Expected B Maturity 09/17/01 Blended Coupon 5.8256% Excess Protection Level 3 Month Average 5.33% September, 1998 4.37% August, 1998 6.33% July, 1998 5.29% Cash Yield 17.38% Investor Charge Offs 5.18% Base Rate 7.83% Over 35 Day Delinquency 5.04% Seller's Interest 13.10% Total Payment Rate 13.10% Total Principal Balance $ 39,849,511,082.92 Investor Participation Amount $ 1,200,000,000.00 Seller Participation Amount $ 5,219,716,564.43