Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

18. The Heart

Electrocardiogram (ECG)

Anatomy & Physiology

18. The Heart

Electrocardiogram (ECG)

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

How can somatic interference be prevented when recording an ECG tracing?

Increase the paper speed of the ECG machine.

Apply the electrodes over bony prominences.

Instruct the patient to remain still and relaxed during the procedure.

Use alcohol to clean the electrodes after recording.

Previous problemNext problem

Verified step by step guidance

Understand the concept of somatic interference: Somatic interference refers to unwanted electrical signals caused by muscle activity, such as movement or tension, which can distort the ECG tracing.

Identify the primary cause of somatic interference: Muscle contractions or patient movement during the procedure are the main contributors to somatic interference.

Evaluate the options provided: Analyze each option to determine its effectiveness in reducing somatic interference. For example, increasing paper speed does not address muscle activity, and applying electrodes over bony prominences may not improve signal quality.

Focus on the correct approach: Instructing the patient to remain still and relaxed minimizes muscle activity, which is the root cause of somatic interference. This is the most effective method to prevent interference during ECG recording.

Consider additional measures: While cleaning electrodes with alcohol ensures proper conductivity, it does not directly address somatic interference. The key is to ensure the patient remains calm and stationary during the procedure.