Question:
Which of the following is not associated with hyperkalemia?
Which of the following is not associated with hyperkalemia?
Show Hint
Hyperkalemia prolongs the PR interval, it never shortens it.
Updated On: Jul 7, 2026
- Tall T waves
- Prolonged QRS interval
- Short P.R. interval
- Sine waves
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Question.
We need to pick the ECG change that does NOT happen with a high blood potassium level.
Step 2: Key Concept.
Hyperkalemia changes how heart cells depolarize and repolarize, and this shows up as a fairly fixed sequence of ECG changes as the potassium level climbs higher.
Step 3: Detailed Explanation.
The earliest sign is tall, peaked T waves from faster repolarization. As potassium rises further, the P wave flattens and the PR interval gets longer, not shorter, because slowed conduction through the atria and AV node delays the impulse. The QRS complex also widens as ventricular conduction slows down. In severe, dangerous hyperkalemia, the widened QRS merges with the T wave to form a sine wave pattern, which warns of an impending cardiac arrest. So tall T waves, a wide QRS, and sine waves are all real findings in hyperkalemia, but a short PR interval is not one of them, since the true change is a prolonged PR interval.
Step 4: Final Answer.
A short P.R. interval is not a feature of hyperkalemia; the actual change is PR prolongation.
We need to pick the ECG change that does NOT happen with a high blood potassium level.
Step 2: Key Concept.
Hyperkalemia changes how heart cells depolarize and repolarize, and this shows up as a fairly fixed sequence of ECG changes as the potassium level climbs higher.
Step 3: Detailed Explanation.
The earliest sign is tall, peaked T waves from faster repolarization. As potassium rises further, the P wave flattens and the PR interval gets longer, not shorter, because slowed conduction through the atria and AV node delays the impulse. The QRS complex also widens as ventricular conduction slows down. In severe, dangerous hyperkalemia, the widened QRS merges with the T wave to form a sine wave pattern, which warns of an impending cardiac arrest. So tall T waves, a wide QRS, and sine waves are all real findings in hyperkalemia, but a short PR interval is not one of them, since the true change is a prolonged PR interval.
Step 4: Final Answer.
A short P.R. interval is not a feature of hyperkalemia; the actual change is PR prolongation.
Was this answer helpful?
0
0
Top NEET PG Medicine Questions
- Identify the condition associated with the murmur in the image below
- A young man came to the medical OPD with complaints of early morning backache and stiffness, which improves on exercise, and persistent red eyes. On examination, lung expansion was less than 3 cm. X-ray is shown in the image given below.
What is the most probable diagnosis? - A patient with hyperkalemia and elevated urea levels underwent dialysis. Towards the end of the session, she became drowsy and had a sudden seizure episode. On examination, thepatient was hypotensive. What is the treatment for this condition?
- A female patient presents to the emergency department with severe restlessness, palpitations, and tremors. She is a known case of bronchial asthma. On examination, the neck looksswollen. Blood pressure is elevated, and tachycardia is noted. ECG shows atrial fibrillation.Which of the following drugs is used for immediate management in this patient?
- A 30-year-old male is found to be positive for HBsAg and HBeAg and is diagnosed with chronic hepatitis B. The patient’s viral load was 2x 100000 and SGPT is found to be doubled. What is the appropriate management in this patient? SGPT-Serum glutamate pyruvate transaminase
View More Questions
Top NEET PG ECG and Electrolyte Disorders Questions
Top NEET PG Questions
- A patient hailing from Delhi presents with fever, arthralgia, and extensive petechial rash for 3 days. Lab investigations revealed a hemoglobin of 9 g/ dL, a white blood cell count of 9000 cells/mm3, a platelet count of 20000 cells/mm3, and a prolonged bleeding time. The clotting time was normal. What is the most likely diagnosis?
- Which of the following statements is true about Trichomonas vaginalis?
- A lady from West Rajasthan presented with an ulcer surrounded by erythema on the right leg. Microscopy of the biopsy from the edge of the ulcer showed organisms with dark staining nuclei and kinetoplast. What is the most likely causative agent?
- A child presents with a fever and a rash. Urine examination showed cells with owl's eye appearance. What is the most likely diagnosis?
- Infection with Clonorchis sinensis is associated with an increased risk of__?
View More Questions