Which of the following changes are seen in ECG reading, in patients with hyperkalemia?

Combined AIIMS - 2020 (Jodhpur, Bhopal, Patna, Raipur)

Medical Surgical Nursing

Medium

Appeared in: Combined AIIMS - 2020 (Jodhpur, Bhopal, Patna, Raipur)

Explanation

Hyperkalemia is defined as a serum potassium level greater than 5.0 mEq/L and is a medical emergency due to its effects on cardiac electrical stability.
The condition causes a predictable sequence of ECG changes as potassium levels increase, affecting different parts of the cardiac cycle.
Tall, peaked T-waves are the earliest sign, followed by PR interval prolongation as the condition worsens.
A shortened QT interval can also be seen in the early stages of hyperkalemia.
As all the listed options are valid ECG findings in hyperkalemia, 'All of these' is the most complete and correct answer.

Option A: This option is a correct finding in hyperkalemia, but it is not the only one. Selecting this alone would be incomplete as other changes also occur.
Option B: This is a valid, though sometimes transient, finding in early hyperkalemia. However, it is not the only change, making this choice incomplete.
Option C: This is a correct finding in moderate to severe hyperkalemia, but it is not the only change. Selecting this alone would be incomplete.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain ECG Interpretation in Hyperkalemia as background academic context rather than a clinical decision trigger.
A nurse's ability to promptly recognize the ECG changes of hyperkalemia is critical for patient safety. These changes indicate a high risk for life-threatening arrhythmias like ventricular fibrillation or asystole.
Upon identifying these ECG changes, the nurse must immediately notify the healthcare provider, anticipate orders for emergency treatment (e.g., IV calcium gluconate, insulin and dextrose, diuretics), and place the patient on continuous cardiac monitoring.
What if the patient had HYPOkalemia (low potassium)? The ECG would show different changes, such as ST-segment depression, flattened T waves, and the appearance of a prominent U wave.

How to Approach the Question

First, identify the core concepts in the question: 'ECG reading' and 'hyperkalemia'.
Recall the known sequence of ECG changes associated with rising potassium levels, from early to severe stages.
Evaluate each option: Is 'Tall and peaked T wave' a sign? Yes. Is 'Shortened QT interval' a sign? Yes. Is 'Prolong PR interval' a sign? Yes.
Since options A, B, and C are all correct findings at various stages of hyperkalemia, the 'All of these' option is the most comprehensive and correct choice.
Confirm that there isn't a more specific qualifier in the question (e.g., 'earliest sign' or 'most severe sign') that would favor one option over the others.

Concept Tested & Keywords

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