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Table 2 Cardiac events within the first 48 h by potassium level at admission

From: Influence of dyskalemia at admission and early dyskalemia correction on survival and cardiac events of critically ill patients

Cardiac eventsSerious hypokalemia K+ < 2.5 mmol/L
N = 120
Moderate hypokalemia 2.5 ≤ K+ < 3 mmol/L
N = 382
Mild hypokalemia 3 ≤ K+ < 3.5 mmol/L
N = 1606
No dyskalemia 3.5 ≤ K+ ≤ 5 mmol/L
N = 8537
Mild hyperkalemia 5 < K+ ≤ 6 mmol/L
N = 1036
Moderate hyperkalemia 6 < K+ ≤ 7 mmol/L
N = 306
Serious hyperkalemia K+ > 7 mmol/L
N = 103
p value*
External electric shock0 (0)6 (1.6)8 (0.5)71 (0.8)13 (1.3)0 (0)3 (2.9)0.01
Cardiac arrest1 (0.8)14 (3.7)23 (1.4)132 (1.5)31 (3)13 (4.2)6 (5.8)< 0.01
Myocardial infarction1 (0.8)1 (0.3)4 (0.2)21 (0.2)5 (0.5)2 (0.7)0 (0)0.54
Minimal heart rate < 40 bpm10 (8.3)27 (7.1)79 (4.9)333 (3.9)79 (7.6)40 (13.1)17 (16.5)< 0.01
Ventricular arrhythmia10 (8.3)43 (11.3)103 (6.4)420 (4.9)73 (7)31 (10.1)14 (13.6)< 0.01
Supra-ventricular arrhythmia6 (5)30 (7.9)105 (6.5)680 (8)109 (10.5)31 (10.1)7 (6.8)< 0.01
Unspecified arrhythmia0 (0)1 (0.3)8 (0.5)35 (0.4)4 (0.4)1 (0.3)0 (0)0.96
Atrioventricular block0 (0)0 (0)2 (0.1)1 (0)0 (0)0 (0)0 (0)0.28
Total20 (16.7)87 (22.8)267 (16.6)1327 (15.5)239 (23.1)83 (27.1)30 (29.1)< 0.01
  1. Cardiac event was achieved if a patient experiment at least one cardiac event in the first 2 days. Results are expressed in number of patients (n) and percentage (%)
  2. *Comparison across serum potassium concentration categories at ICU admission