Mark the incorrect statement w.r.t ECG

Options

A. It is recorded with the help of electrocardiograph
B. While recording a standard ECG, Einthoven's triangle is created by placing electrical leads on both wrists and on left angle
C. T-wave represents the and of joint diastole
D. By counting the number of QRS complexes one can determine the heart rate of an individual

Answer

To solve the question, "Mark the incorrect statement w.r.t ECG," we will analyze each option provided and determine which statement is incorrect.

### Step-by-Step Solution:

1. **Understanding ECG**: An electrocardiogram (ECG) is a recording of the electrical activity of the heart over a period of time. It is used to diagnose various heart conditions.

2. **Evaluating the Statements**:
- **Statement 1**: "It is recorded with the help of electrocardiograph."
- This statement is **correct**. An electrocardiograph is the device used to record the electrical activity of the heart.

- **Statement 2**: "While recording a standard ECG, an interval triangle is created by placing the electrical leads on both wrists and on the left ankle."
- This statement is also **correct**. The leads are placed on both wrists and the left ankle to form a triangle, known as the Einthoven triangle, which is used in standard ECG recordings.

- **Statement 3**: "T-Wave represents the end of the joint diastole."
- This statement is **incorrect**. The T-wave actually represents the end of ventricular systole (not diastole), indicating ventricular repolarization.

- **Statement 4**: "By counting the number of QRS complexes, one can determine the heart rate of an individual."
- This statement is **correct**. The heart rate can be calculated by counting the number of QRS complexes in a given time frame.

3. **Conclusion**: The incorrect statement regarding ECG is **Statement 3**, which incorrectly describes the T-wave.

### Final Answer:
The incorrect statement w.r.t ECG is: **"T-Wave represents the end of the joint diastole."**

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