Q. No.1. Ventricular depolarization
2. Ventricular repolarization
3. Atrial depolarization
4. Atrial repolarization
The period of systole is represented on surface ECG as between:
1. Beginning of P wave and beginning of Q wave
2. End of S wave and beginning of T wave
3. Shortly after Q wave and end of the T wave
4. Two successive R waves
In a normal ECG, The T wave represents:
| 1. | ventricular depolarization | 2. | atrial repolarization |
| 3. | ventricular repolarization | 4. | atrial depolarization |
QRS complexes on the ECG tracings show that:
1. The atria are depolarizing.
2. The ventricles are depolarizing.
3. The ventricles are repolarizing.
4. The heart is at rest.
On a surface ECG, the end of ventricular systole is marked by:
| 1. | The end of the QRS complex |
| 2. | The beginning of T wave |
| 3. | The end of T wave |
| 4. | The beginning of P wave |
If you compare with the normal ECG tracing given in your NCERT, the following ECG shows an abnormal:
| 1. P wave 2. R wave 3. S wave 4. T wave |
 |
| 1. P wave | 2. PR interval |
| 3. QRS complex | 4. ST segment |
To obtain a standard ECG, a patient is connected to the machine with three electrical leads including all the following except:
| 1. | One to right wrist | 2. | One to left wrist |
| 3. | One to right ankle | 4. | One to left ankle |
Match Column I and Column II :
| Column I | Column II |
| (a) P-wave | (i) Depolarisation of ventricles |
| (b) QRS complex | (ii) Repolarisation of ventricles |
| (c) T-wave | (iii) Coronary ischemia |
| (d) Reduction in the size of T-wave | (iv) Depolarisation of atria |
| (v) Repolarisation of atria |
Select the correct option:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (v) | (iv) |
| 2. | (iv) | (i) | (ii) | (iii) |
| 3. | (iv) | (i) | (ii) | (v) |
| 4. | (ii) | (i) | (v) | (iii) |
Most cases of CAD result from:
| 1. | Angina pectoris | 2. | Myocardial infarction |
| 3. | Atherosclerosis | 4. | Heart failure |
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