Exhibit 99.29 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-N KEY PERFORMANCE FACTORS September 30, 1999 Expected B Maturity 11/15/00 Blended Coupon 5.5591% Excess Protection Level 3 Month Average 6.01% September, 1999 5.87% August, 1999 5.85% July, 1999 6.33% Cash Yield 18.03% Investor Charge Offs 4.60% Base Rate 7.56% Over 30 Day Delinquency 4.90% Seller's Interest 6.99% Total Payment Rate 14.16% Total Principal Balance $45,780,732,257.76 Investor Participation Amount $900,000,000.00 Seller Participation Amount $3,198,912,739.27