Exhibit 99.43 MBNA MASTER CREDIT CARD TRUST II SERIES 1999-H KEY PERFORMANCE FACTORS November 30, 1999 Expected B Maturity 4/15/2004 Blended Coupon 6.4874% Excess Protection Level 3 Month Average 4.72% November, 1999 4.98% October, 1999 5.24% September, 1999 3.94% Cash Yield18.36% Investor Charge Offs 4.89% Base Rate 8.49% Over 30 Day Delinquency 5.02% Seller's Interest 8.52% Total Payment Rate14.09% Total Principal Balance$48,461,894,441.68 Investor Participation Amount$1,000,000,000.00 Seller Participation Amount$4,130,074,923.19