Biomedical Instrumentation Multiple Choice Questions on “Video Printers”.
1. Any disturbance in the heart’s normal rhythmic contraction is called?
a) Heart stroke
b) Cardiac arrest
c) Arrhythmias
d) Premature contraction
Answer: c
Clarification: Any disturbance in the heart’s normal rhythmic contraction is called an arrhythmias or cardiac dysrhythmia. In this arrhythmias heart can’t beat in a regular rhythm. In arrhythmia heart-rate will be higher than normal rate or will be less than the normal rate.
2. Which diagnostic statement is based on ECG wave shapes that attempt to describe the state of the working muscle masses?
a) Rhythm statements
b) Morphological statements
c) Morphological-Rhythm statements
d) Rhythm-Morphological statements
Answer: b
Clarification: Morphological statement-primarily based on ECG wave shapes that attempt to describe the state of the working muscle masses. The other type of diagnostic statement is Rhythm statement. These both diagnostic statements are observed from the ECG records.
3. Rhythm statements concerned with the site and rate of the cardiac pacemaker and the propagation of impulses through the conduction system.
a) True
b) False
Answer: a
Clarification: Rhythm statements concerned with the site and rate of the cardiac pacemaker and the propagation of impulses through the conduction system is true because the other type of the diagnostic statements is Morphological statements and it is primarily based on ECG wave shapes that attempt to describe the state of the working muscle masses.
4. Which wave from ECG waveforms becomes widened when the self-triggering impulse does not arrive through the AV node?
a) P wave
b) QRS wave
c) ST wave
d) T wave
Answer: b
Clarification: Sometimes irritation occurs in the ventricles, the self-triggering impulse does not arrive through the node and thus travels a different and slower path in spreading over the ventricles. The QRS wave then becomes widened and is classified as a ventricular ectopic beat.
5. When the self-triggering impulse does not arrive at the AV node and travels a different and slower path over the ventricles, the QRS becomes widened and is classified as ___________
a) Ectopic beat
b) Ventricular-ectopic beat
c) Ventricular beat
d) Atrio-ventricular beat
Answer: b
Clarification: Sometimes irritation occurs in the ventricles, the self-triggering impulse does not arrive through the node and thus travels a different and slower path in spreading over the ventricles. The QRS wave then becomes widened, and is classified as a ventricular ectopic beat. This ectopic beat is classified from ventricles so it is called as a ventricular ectopic beat.
6. An ectopic beat, which starts in an abnormal location in the heart and is often premature, therefore also called _______
a) Pre ventricular contraction
b) Premature ventricular beat
c) Pre ventricular beat
d) Premature ventricular contraction
Answer: d
Clarification: An ectopic beat is a beat, which starts in an abnormal location in the heart and is often premature, therefore also called premature ventricular contraction (PVC), i.e. it occurs sooner than the next expected beat.
7. When the heartbeat is slower than the normal rate of the heart(less than 60), this type of arrhythmias called _______
a) Bradycardia
b) Tachycardia
c) Arterial contraction
d) Ventricular contraction