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Mark incorrect statement regarding norma...

Mark incorrect statement regarding normal ECG

A

Patient is connected to 3 electrical leads (one to each wrist and to the left ankle)

B

'T' wave represents atrial repolarization

C

Q marks the beginning of ventricular systole

D

R represents ventricular depolarization

Text Solution

AI Generated Solution

The correct Answer is:
To determine the incorrect statement regarding a normal ECG (electrocardiogram), we need to analyze the components of the ECG and their respective meanings. Here’s a step-by-step breakdown: ### Step 1: Understand the Components of ECG - The normal ECG consists of three main components: the P wave, the QRS complex, and the T wave. - **P wave**: Represents atrial depolarization (contraction of the atria). - **QRS complex**: Represents ventricular depolarization (contraction of the ventricles). - **T wave**: Represents ventricular repolarization (relaxation of the ventricles). ### Step 2: Analyze Each Statement - Now, let's evaluate the statements provided in the question: 1. **"Patient is connected to three electrical leads, one each at the wrist and to the left ankle."** - This statement is correct. Standard ECG leads are often placed on the wrists and ankles. 2. **"P wave represents atrial repolarization."** - This statement is incorrect. The P wave represents atrial depolarization, not repolarization. 3. **"QRS complex marks the beginning of ventricular systole."** - This statement is correct. The QRS complex indicates the start of ventricular contraction (systole). 4. **"R represents ventricular depolarization."** - This statement is correct. The R wave is part of the QRS complex, which represents ventricular depolarization. ### Step 3: Identify the Incorrect Statement - From the analysis, the incorrect statement is: - **"P wave represents atrial repolarization."** (This is incorrect; it represents atrial depolarization.) ### Conclusion - The incorrect statement regarding normal ECG is that the P wave represents atrial repolarization. ---
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