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Table 3 The frequency of ECG alterations possibly associated with hyperkalemia in normokalemic versus hyperkalemic patients. (*: p ≤ 0.05)

From: ECG alterations suggestive of hyperkalemia in normokalemic versus hyperkalemic patients

   AF ST depression Short QTc Prolonged QTc
Control (n = 170) % 10.6% 28.8% 0.0% 5.3%
n 18 49 0 9
All hyperkalemia (n = 135) % 15.6% 23.0% 0.7% 18.5%*
n 21 31 1 25
Moderate hyperkalemia (n = 97) % 11.3% 22.7% 1.0% 17.5%*
n 11 22 1 17
Severe hyperkalemia
(n = 38)
% 26.3%* 23.7% 0.0% 21.1%*
n 10 9 0 8