Normal limits of the electrocardiogram derived from a large database of Brazilian primary care patients

Figures

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  Fig. 1. QT index according sex

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  Fig. 2. Excluded patients

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  Fig. 3. Age and sex distribution of the study population

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  Fig. 4. Percentiles 2nd, 50th and 98th for heart rate according age and sex

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  Fig. 5. Comparison of lower, median and upper normal limits for heart rate of different studies according age groups and sex

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  Fig. 6. Percentiles 2nd, 50th and 98th for P-wave frontal axis according age and sex

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  Fig. 7. Percentiles 2nd, 50th and 98th for QRS-wave frontal axis according age and sex

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  Fig. 8. Percentiles 2nd, 50th and 98th for T-wave frontal axis according age and sex

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  Fig. 9. Comparison of lower, median and upper normal limits for P-wave frontal axis of different studies according age groups and sex

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  Fig. 10. Comparison of lower, median and upper normal limits for QRS-wave frontal axis of different studies according age groups and sex

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  Fig. 11. Comparison of lower, median and upper normal limits for T-wave frontal axis of different studies according age groups and sex

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  Fig. 12. Percentiles 2nd, 50th and 98th for overall P duration according age and sex