Key result
Hyperkalemia can induce ECG changes mimicking acute anteroseptal MI and bifascicular block without true infarction.
Case Report (n=1)
Hyperkalemia can induce unusual ECG abnormalities mimicking acute anteroseptal myocardial infarction and causing acute bifascicular block.
Hyperkalemia must be excluded in ECGs mimicking anteroseptal MI with bifascicular block; case report leaves open its true frequency.
A case with lymphocytic lymphoma showing unusual ECG findings consisting of pseudoacute anteroseptal myocardial infarction associated with acute bifascicular block (a combination of right bundle branch block and left anterior hemiblock) secondary to hyperkalemia is presented. To our knowledge, this is the first reported case showing such unusual hyperkalemia-induced ECG abnormalities. No evidence of myocardial infarction (acute or old) was found in this case on the post-mortem examination. The importance of recognizing pseudomyocardial infarction in hyperkalemia is emphasized to distinguish from true myocardial infarction. In addition, it has been stressed that hyperkalemia is one of the important causes of acute bifascicular block.
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Burris et al. (2008) conducted a case report in Hyperkalemia, lymphocytic lymphoma, pseudomyocardial infarction (n=1). Hyperkalemia was evaluated on ECG findings (pseudoacute anteroseptal myocardial infarction associated with acute bifascicular block). Hyperkalemia can induce unusual ECG abnormalities mimicking acute anteroseptal myocardial infarction and acute bifascicular block, without evidence of true myocardial infarction on post-mortem.
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