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Table 4 Linear regressions of all ECG parameters for a 3 month-MI rabbit evolution grouped by leads

From: The allometric model in chronic myocardial infarction

Lead

Parameter

β (Mean ± SD)

δ (Mean ± SD)

r

p-value

L3

QT

3.464 ± 1.072

3.494 ± 0.8387

0.78

0.0145

L2

TA

−2.474 ± 0.7736

−3.593 ± 0.5926

0.77

0.0151

L1

STA

1.832 ± 0.5997

0.06115 ± 0.4994

0.75

0.0185

L1

QTFRA

0.1042 ± 0.03840

2.462 ± 0.03198

0.72

0.0300

L3

TPE

2.303 ± 0.9132

3.087 ± 0.7142

0.69

0.0397

L1

QTFRI

0.1691 ± 0.06926

2.456 ± 0.05769

0.68

0.0447

L1

QTMA

0.1918 ± 0.07858

2.346 ± 0.06545

0.68

0.0447

L1

QTB

0.1384 ± 0.0617

2.531 ± 0.05142

0.64

0.0600

L3

QA

−0.6352 ± 0.2849

−0.8878 ± 0.2228

0.64

0.0610

L3

SA

1.202 ± 0.6668

0.03635 ± 0.5215

0.55

0.1145

L2

PD

1.011 ± 0.5893

1.510 ± 0.4514

0.54

0.1299

L1

QRSA

1.210 ± 0.7190

0.2376 ± 0.5988

0.53

0.1362

L3

QRSD

0.5699 ± 0.3995

1.566 ± 0.3124

0.47

0.1968

L1

RR

0.5025 ± 0.3669

2.675 ± 0.3056

0.45

0.2131

L2

PR

−0.7553 ± 0.7338

0.3425 ± 0.5621

0.36

0.3376

L1

RA

0.7621 ± 0.7972

0.09869 ± 0.6639

0.34

0.3709

L3

JT

0.5296 ± 0.6854

1.821 ± 0.5360

0.26

0.4650

L3

QTHO

0.1448 ± 0.3730

2.350 ± 0.2917

0.14

0.7095

  1. β: slope of linear regression, δ: Y-intercept when X = 0 of linear regression, r: correlation coefficient, p-value: statistical significance of linear fit. L1: Lead I, L2: Lead II, L3: Lead III, QTFRA: Framingham correction formula, QTMA: Matsunaga correction formula, QTB: Bazett correction formula, QTFRI: Fridericia correction formula, QTHO: Hodges correction formula, QT: QT interval, TA: amplitude of T-wave, STA: amplitude of ST segment deviation, TPE: time from peak to end of the T-wave, QA: amplitude of Q-wave, SA: amplitude of S-wave, RA: amplitude of R-wave, QRSA: amplitude of QRS complex, QRSD: duration of QRS complex, RR: RR interval, PR: PR interval, JT: JT interval.