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Table 2 Distribution of abnormalities in the ECG of 80 centenarians, classified by the Minnesota code

From: Electrocardiographic abnormalities in centenarians: impact on survival

  Total n = 80 Male n = 26 Female n = 64 P
No. % No. % No. %
Sinus rhythm 59 73.8% 19 73.1% 40 74.1% .924
Arrhythmias 44 55% 15 57.7% 29 53.7% .737
 Premature supraventricular, junctional or ventricular beats 29 36.3% 8 30.8% 21 38.9% .479
 Atrial fibrillation 21 26.3% 7 26.9% 14 25.9% .924
 Other arrhythmias 5 6.3% 2 7.7% 3 5.6% .658
QRS axis deviation 27 33.8% 9 34.6% 18 33.3% .910
 Left-axis deviation 24 30% 7 26.9% 17 31.5% .677
 Right-axis deviation 1 1.3% 0 0% 1 1.9% .999
 Extreme axis deviation 2 2.5% 2 7.7% 0 0% .103
High amplitude R waves 7 8.8% 1 3.8% 6 11.1% .418
 Left ventricular hypertrophy 7 8.8% 1 3.8% 6 11.1% .418
AV conduction defect 9 11.3% 3 11.5% 6 11.1% .999
 Second-degree AV block 1 1.3% 0 0% 1 1.9% .999
 First-degree AV block 8 10% 3 11.5% 5 9.3% .710
Ventricular conduction defect 26 32.5% 11 42.3% 15 27.8% .194
 Left bundle branch block 8 10% 1 3.8% 7 13% .264
 Right bundle branch block 12 15% 6 23.1% 6 11.1% .160
 Right bundle branch block incomplete 2 2.5% 0 0% 2 3.7% .999
 Left bundle branch block incomplete 7 8.8% 4 15.4% 3 5.6% .206
 Nonspecific intraventricular conduction delay 2 2.5% 2 7.7% 0 0% .103
Repolarisation abnormalities 25 31.3% 8 30.8% 17 31.5% .949
 ST depression 17 21.3% 3 11.5% 14 25.9% .242
 T amplitude zero, negative or diphasic 18 22.5% 7 26.9% 11 20.4% .511
 Other repolarisation abnormalities 5 6.3% 2 7.7% 3 5.6% .658
Q and QS patterns 13 16.3% 5 19.2% 8 14.8% .616
Miscellaneous items 27 33.8% 6 23.1% 21 38.9% .161
 Low QRS amplitude 9 11.3% 3 11.5% 6 11.1% .999
 Atrial enlargement 7 8.8% 1 3.8% 6 11.1% .418
 QRS transition zone to the right/left 15 18.8% 3 11.5% 12 22.2% .363
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