Question

ECG findings in hypo/hyperkalemiaIf you correct low K and it doesn't normalize:

a) U-waves persist
b) Peaked T-waves persist
c) Prolonged QT interval persists
d) Osborn waves (J waves) persist

Answer 1

In the case where low potassium is corrected and the ECG does not normalize, U-waves are most likely to persist. Peaked T-waves, Osborn waves, and prolonged QT intervals are unlikely to persist upon correction of hypokalemia.

Step-by-step explanation:

The question pertains to the interpretation of electrocardiogram (ECG) findings in conditions of abnormal potassium levels, specifically hypokalemia (low potassium) and hyperkalemia (high potassium). When treating hypokalemia, normalizing potassium levels should resolve certain ECG changes. However, if correction of low potassium does not normalize the ECG, one would expect that U-waves would persist. This is because U-waves are associated with hypokalemia and can be a sign of continuing low potassium levels. On the other hand, peaked T-waves are characteristic of hyperkalemia and would not be expected to persist if hypokalemia is corrected. Regarding prolonged QT intervals, these can be related to a variety of electrolyte disturbances and other conditions. Lastly, Osborn waves (or J waves) are typically associated with hypothermia or hypercalcemia and are not directly related to potassium levels.