Question

In an ECG, tall T-wave indicates

• A. Hypercalcemia
• B. Hyperkalemia
• C. Hypokalemia
• D. Hypocalcemia

Hint:

ECG changes due to potassium: \[ \boxed{ \begin{aligned} &\text{Hyperkalemia} &&\rightarrow \text{Tall peaked T-wave} &\text{Hypokalemia} &&\rightarrow \text{Flattened T-wave} \end{aligned} } \]

Answer 1

The Correct Option is B

Step 1: Recall the significance of the T-wave. The T-wave in an ECG represents \[ \boxed{\text{Ventricular repolarization}.} \]

Step 2: Effect of potassium on ECG. An increase in blood potassium level (hyperkalemia) produces \[ \boxed{\text{Tall, peaked T-waves}.} \] Hypokalemia, on the other hand, causes flattened T-waves.

Step 3: Choose the correct option. Hence, \[ \boxed{(B)} \] is the correct answer.