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Copyright ©The Author(s) 2015.
World J Cardiol. Jun 26, 2015; 7(6): 315-325
Published online Jun 26, 2015. doi: 10.4330/wjc.v7.i6.315
Table 2 QT prediction equations
Ref.Sample sizePopulation characteristicsEquation
Linear functions
Adams (1936)[33]104Men (50) and women (54), mean age 28 yrQTpADM
Schlamowitz (1946)[34]650Men (650) aged 18 to 44 yrQTpSCH
Karjalainen et al (1981)[27]324 ECGsMen (military personnel) aged 18 to 28 yrQTpKRJ
Simonson et al (1962)[10]960Men (649) and women (311), aged 20 to 59 yrQTpSMN
Rational functions
Boudoulas et al (1981)[35]200Men (100) and women (100), aged 18 to 79 yrQTpBRL
Hodges et al (1983)[31]607Men (303) and women (304), aged 20 to 89 yrQTpHDG
Wohlfart and Pahlm (1994)[36]37Men (16) and women (21), aged 38 to 68 yr, taken at rest and during exerciseQTpWHL
Klingfield et al (1995)[37]94Men, mean age 48 yr, taken at rest and during exerciseQTpKLN
Power functions
Bazett (1920)[8]39Men (20) and women (19), aged 14 to 53 yrQTpBZT
Fridericia (1920)[9]50Men and women, aged 30 to 81 yrQTpFRD
Mayeda (1934)[24]200Men (135) and women (65), aged 18 to 64 yrsQTpMYD
Schlomka and Raab (1936)[30]336Men and womenQTpSCH
Shipley and Hallaran (1936)[23]200Men and women, aged 22 to 35 yrQTpSHP
Hegglin and Holzmann (1937)[38]700Men and womenQTpHGG
Kawataki et al (1984)[32]9Men aged 18 to 71 yrQTpKWT
Goto et al (2008)[25]1276Men aged 20 to 35 yrQTpGOT
Logarithmic functions
Ashman (1942)[39]1083Men (432), women (425), and children (226)QTpASH
Merri et al (1989)[40]364Men (191) and women (173) aged 10 to 81 yrQTpMRR
Exponential functions
Sarma et al (1984)[28]16Men (10) aged 18 to 30 yr, taken at rest and during exerciseQTpSRM
Lecocq et al (1989)[41]11Men (5) and women (6), aged 22 to 26 yr, taken at rest, during exercise, and after drug administrationQTpLCC
Arrowood et al (1993)[42]1616 subjects, aged 21 to 62 yrQTpARR

Citation: Rabkin SW, Cheng XB. Nomenclature, categorization and usage of formulae to adjust QT interval for heart rate. World J Cardiol 2015; 7(6): 315-325