Exhibit 99.37 MBNA MASTER CREDIT CARD TRUST II SERIES 1999-H KEY PERFORMANCE FACTORS March 31, 2001 Expected B Maturity 4/15/2004 Blended Coupon 6.0238% Excess Protection Level 3 Month Average 7.24% March, 2001 7.49% February, 2001 7.22% January, 2001 7.00% Cash Yield20.71% Investor Charge Offs 4.83% Base Rate 8.39% Over 30 Day Delinquency 4.90% Seller's Interest 7.37% Total Payment Rate14.60% Total Principal Balance$56,622,749,044.91 Investor Participation Amount$1,000,000,000.00 Seller Participation Amount$4,172,058,483.42