Q. No.Which of the following is not represented on an ECG of a healthy individual?
| 1. | Ventricular depolarization | 2. | Ventricular repolarization |
| 3. | Atrial depolarization | 4. | Atrial repolarization |
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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
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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.
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In a normal ECG, The T wave represents:
| 1. | ventricular depolarization | 2. | atrial repolarization |
| 3. | ventricular repolarization | 4. | atrial depolarization |
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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 |
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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 |
 |
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| 1. P wave | 2. PR interval |
| 3. QRS complex | 4. ST segment |
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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 |
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Most cases of CAD result from:
| 1. | Angina pectoris | 2. | Myocardial infarction |
| 3. | Atherosclerosis | 4. | Heart failure |
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Match each item in Column I with one in Column II and select the correct answer from the codes given:
| COLUMN I | COLUMN II | ||
| A. | Heart failure | a. | Lowered ejection fraction of a ventricle |
| B. | Heart attack | b. | Damage to the cardiac muscle |
| C. | Heart block | c. | Abnormal delay in conduction in nodal tissue |
| D. | Cardiac arrest | d. | Sudden stoppage of the heart |
Codes
| A | B | C | D | |
| 1. | a | b | c | d |
| 2. | b | a | c | d |
| 3. | b | a | d | c |
| 4. | a | d | b | c |
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