If one person is complaining of sudden chest pain on left side and exaggerated during walking. It does not relieve by simple analgesic then which of following biomedical technique used firstly ?

Options

A. MRI
B. ECG
C. CATScan
D. Troponin test

Answer

To address the question regarding the sudden chest pain on the left side that worsens during walking and does not respond to simple analgesics, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Symptoms**: The patient is experiencing sudden chest pain on the left side, which intensifies with physical activity (walking) and does not improve with analgesics. These symptoms are indicative of a potential heart-related issue, possibly angina pectoris.

2. **Understand Angina Pectoris**: Angina pectoris occurs when the heart muscle does not receive enough oxygen, often due to narrowed coronary arteries. The pain can be triggered by physical exertion, emotional stress, or heavy meals.

3. **Determine the First Biomedical Technique**: Given the symptoms and the need to assess the heart's condition, the first step in diagnosis should be to evaluate the heart's electrical activity. The most appropriate and immediate test for this is an Electrocardiogram (ECG).

4. **Explain the ECG**: An ECG records the electrical signals of the heart and can help identify issues such as arrhythmias, ischemia, or previous heart attacks. It provides crucial information about the heart's health and is a non-invasive, quick test.

5. **Eliminate Other Options**: While MRI and CT scans are useful for visualizing internal structures, they are not the first-line tests for assessing acute chest pain related to heart issues. Similarly, troponin tests are used to detect heart muscle damage but are typically conducted after an ECG.

6. **Conclusion**: Based on the symptoms and the need for immediate assessment of the heart, the first biomedical technique to be used in this scenario is an Electrocardiogram (ECG).

### Final Answer:
The first biomedical technique to be used is an Electrocardiogram (ECG).

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