Electrocardiographic pattern of apparently healthy African adolescent athletes in Nigeria

BMC Pediatrics

Table 4 Group 1 (training related) ECG findings in athletes and controls

ECG Abnormality	Athletes (N = 180) n (%)	Controls (N = 180) n (%)	Test statistic χ2	P value
First Degree AV Block
Present	9 (5.0)	1 (0.6)	6.583^a	0.020
LVH
Present	20 (11.1)	7 (3.9)	6.767	0.009
Sinus Bradycardia
Present	9 (5.0)	1 (0.6)	6.583^a	0.020
Ectopic atrial rhythm
Present	0 (0.0)	2 (1.1)	2.011^a	0.499
Junctional Rhythm
Present	0 (0.0)	1 (0.6)	1.003^a	0.500
IRBBB
Present	11 (6.1)	6 (3.3)	1.543	0.214
Sinus Arrhythmia
Present	5 (2.8)	14 (7.8)	4.501	0.034
Early Repolarization changes
Present	6 (3.3)	1 (0.6)	3.642^a	0.121
Total	60 (33.3)	33 (18.3)

IRBBB Incomplete Right Bundle Branch Block, LVH Left ventricular hypertrophy
^aDerived by Fisher’s exact test

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