Lesson Worksheet: Electrocardiography Physics
In this worksheet, we will practice analyzing graphs of electrocardiograms corresponding to heart rhythms.
Q1:
The graph shows the changes in the potential difference across the electrodes of an electrocardiograph with time for a single heartbeat. Which of the following has occurred between and ?
- AAtrial contraction
- BAtrial relaxation
- CVentricular relaxation
- DVentricular contraction
Q2:
The graph shows the changes in the potential difference across the electrodes of an electrocardiograph with time for a single heartbeat. Which of the following has occurred between and ?
- AAtrial relaxation
- BVentricular relaxation
- CAtrial contraction
- DVentricular contraction
Q3:
The graph shows the changes in the potential difference across the electrodes of an electrocardiograph with time. How many complete heartbeats have occurred during the time interval shown on the graph?
Q4:
The graph shows the changes in the potential difference across the electrodes of an electrocardiograph with time for a single heartbeat. Which of the following is closest to the value of ?
- A2 s
- B2.5 s
- C0.5 s
- D1 s
- E0.2 s
Q5:
The graph shows the changes in the potential difference across the electrodes of an electrocardiograph with time for a single heartbeat. Which of the following has occurred between and ?
- AVentricular relaxation
- BVentricular contraction
- CAtrial contraction
- DNone of the above
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