Table 3.
ECG parameters for patients from 1 to 29 years-old: (1st percentile; 2nd percentile; 50th percentile; 98th percentile; 99th percentile)
| Parameter | Sex | 1–2 | 3–4 | 5–7 | 8–11 | 12–15 | 16–19 | 20–29 |
|---|---|---|---|---|---|---|---|---|
| Heart rate (bpm) | Male | (52; 59; 107; 166; 170) | (67; 70; 97; 132; 139) | (59; 61; 86; 120; 126) | (53; 55; 76; 108; 114) | (47; 49; 69; 101; 107) | (44; 46; 65; 98; 105) | (44; 46; 65; 98; 104) |
| Female | (58; 66; 108; 163; 199) | (64; 69; 98; 138; 141) | (62; 64; 88; 124; 133) | (56; 58; 81; 115; 121) | (52; 54; 75; 107; 114) | (51; 53; 73; 105; 112) | (51; 53; 73; 104; 111) | |
| P Frontal Axis (°) | Male | (−95; −10; 53; 85; 116) | (−30; −14; 50; 79; 96) | (−34; −22; 44; 74; 81) | (−35; −21; 41; 74; 79) | (−33; −20; 44; 77; 82) | (−32; −21; 54; 81; 85) | (−22; −13; 54; 80; 85) |
| Female | (−12; −6; 53; 78; 85) | (−30; −10; 51; 76; 90) | (−19; −11; 49; 74; 83) | (−21; −12; 45; 74; 78) | (−21; −13; 48; 76; 80) | (−22; −13; 51; 77; 82) | (−18; −11; 51; 78; 81) | |
| QRS Frontal Axis (°) | Male | (−46; −26; 61; 124; 132) | (−21; −9; 61; 99; 111) | (−29; −10; 64; 101; 111) | (−31; −8; 64; 99; 107) | (−28; −11; 66; 101; 107) | (−41; −18; 68; 100; 107) | (−37; −20; 59; 96; 101) |
| Female | (−49; −20; 62; 102; 136) | (−22; −3; 66; 102; 108) | (−9; 0; 67; 100; 109) | (−14; 0; 66; 98; 104) | (−8; 2; 65; 95; 100) | (−13; 0; 63; 95; 99) | (−16; −5; 56; 89; 95) | |
| T Frontal Axis (°) | Male | (−9; 2; 43; 70; 73) | (5; 9; 43; 65; 69) | (7; 13; 45; 67; 70) | (7; 12; 46; 68; 71) | (2; 9; 48; 71; 73) | (−3; 3; 47; 72; 75) | (−12; −5; 40; 71; 75) |
| Female | (8; 12; 43; 73; 77) | (−4; 0; 42; 68; 70) | (4; 9; 44; 68; 71) | (1; 8; 45; 69; 72) | (0; 4; 44; 69; 73) | (−2; 3; 42; 70; 73) | (−7; −1; 38; 68; 72) | |
| Overall P Duration (ms) | Male | (63; 64; 84; 124; 142) | (64; 70; 86; 112; 124) | (64; 68; 88; 114; 128) | (68; 72; 94; 118; 132) | (68; 72; 98; 124; 134) | (68; 74; 102; 126; 134) | (72; 78; 106; 132; 138) |
| Female | (52; 63; 84; 115; 128) | (64; 68; 86; 115; 127) | (68; 72; 90; 116; 128) | (70; 72; 94; 116; 130) | (72; 76; 98; 124; 132) | (72; 78; 100; 128; 134) | (74; 78; 104; 132; 138) | |
| Overall PR Interval (ms) | Male | (81; 86; 118; 184; 192) | (90; 92; 122; 170; 186) | (90; 94; 124; 174; 188) | (96; 100; 132; 180; 190) | (98; 104; 136; 188; 202) | (102; 106; 142; 196; 206) | (104; 110; 148; 200; 212) |
| Female | (84; 87; 118; 171; 178) | (88; 90; 120; 166; 171) | (90; 94; 124; 166; 173) | (94; 98; 128; 178; 188) | (98; 102; 136; 184; 196) | (98; 104; 138; 188; 198) | (102; 106; 142; 192; 202) | |
| Overall QRS Duration (ms) | Male | (60; 62; 74; 98; 101) | (64; 66; 76; 92; 96) | (66; 66; 80; 99; 102) | (68; 70; 84; 102; 106) | (72; 74; 90; 108; 112) | (74; 76; 94; 114; 116) | (76; 78; 96; 114; 116) |
| Female | (58; 60; 72; 97; 100) | (62; 62; 74; 90; 94) | (62; 64; 78; 96; 98) | (66; 68; 80; 98; 100) | (68; 70; 84; 102; 106) | (70; 70; 86; 104; 108) | (70; 72; 88; 106; 110) | |
| QT Interval (ms) | Male | (239; 250; 314; 412; 426) | (276; 281; 332; 396; 405) | (294; 300; 356; 412; 423) | (314; 322; 378; 436; 446) | (324; 332; 390; 452; 460) | (320; 328; 390; 454; 462) | (324; 332; 390; 456; 464) |
| Female | (224; 255; 314; 419; 454) | (271; 278; 332; 396; 412) | (286; 296; 350; 402; 408) | (306; 314; 368; 426; 434) | (314; 322; 380; 440; 450) | (316; 326; 382; 442; 450) | (320; 328; 386; 446; 454) | |
| QTc Hodges (ms) | Male | (367; 370; 405; 444; 455) | (364; 369; 399; 430; 437) | (370; 375; 403; 436; 441) | (374; 377; 408; 440; 445) | (370; 374; 408; 446; 452) | (364; 368; 400; 442; 450) | (365; 368; 400; 442; 449) |
| Female | (363; 367; 404; 459; 470) | (369; 371; 401; 436; 440) | (371; 375; 403; 431; 437) | (373; 378; 407; 438; 442) | (375; 379; 409; 443; 449) | (373; 377; 408; 443; 449) | (375; 379; 411; 447; 452) | |
| QTc Bazett (ms) | Male | (377; 384; 421; 459; 469) | (377; 384; 421; 460; 467) | (381; 388; 425; 463; 469) | (381; 386; 425; 463; 469) | (368; 374; 419; 462; 468) | (358; 364; 406; 452; 458) | (359; 364; 406; 451; 459) |
| Female | (380; 383; 421; 467; 479) | (382; 388; 424; 464; 470) | (385; 390; 425; 461; 467) | (384; 389; 427; 465; 471) | (382; 387; 426; 466; 471) | (377; 383; 423; 463; 469) | (379; 385; 426; 466; 471) | |
| QTc Fridericia (ms) | Male | (332; 342; 381; 429; 434) | (349; 358; 389; 427; 432) | (361; 367; 400; 439; 443) | (371; 376; 408; 442; 447) | (368; 372; 408; 447; 453) | (362; 366; 400; 441; 448) | (363; 367; 400; 439; 446) |
| Female | (332; 339; 383; 445; 453) | (354; 358; 391; 431; 438) | (361; 366; 398; 433; 436) | (369; 374; 406; 440; 444) | (372; 377; 410; 446; 451) | (371; 375; 408; 444; 450) | (374; 378; 411; 448; 454) | |
| QTc Framingham (ms) | Male | (336; 344; 382; 429; 435) | (355; 361; 390; 426; 430) | (364; 371; 401; 436; 441) | (374; 378; 409; 442; 446) | (368; 373; 409; 446; 452) | (359; 365; 400; 440; 447) | (361; 365; 400; 438; 444) |
| Female | (332; 345; 382; 441; 448) | (358; 359; 390; 428; 435) | (363; 369; 399; 430; 434) | (372; 376; 406; 439; 444) | (375; 379; 410; 444; 450) | (373; 377; 409; 444; 449) | (375; 380; 412; 447; 453) |