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
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 |
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 |
A chest pain or pressure, usually due to not enough blood flow to the heart muscle, is known as:
1. hypoxia | 2. infarction |
3. angina | 4. diaphoresis |