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Abstract
<p class="first" id="d2823744e134">Despite the potentially life-threatening consequences
of hyperkalemia, symptoms are
often absent or mild. However, when hyperkalemia has been recognized, evaluation of
vital signs is essential for determining hemodynamic stability and identifying the
presence of cardiac arrhythmias related to the hyperkalemia. Quite commonly, and depending
on the severity and rapidity of onset, hyperkalemia may be associated with substantial
electrocardiographic (EKG) changes that can lead to death if proper interventions
are not instituted. Through its effects on the resting membrane potential and threshold
potential of excitable cells, hyperkalemia is a potentially life-threatening disorder.
Symptoms and physical examination findings are often absent. Once identified, the
entire clinical picture must be taken into account, including an assessment of hemodynamic
stability, the presence of other electrolyte abnormalities, and an EKG evaluation.
While there is a typical progression of EKG findings based on hyperkalemia severity,
EKG manifestations are myriad and their evolution may be unpredictable.
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