Table of contents

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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 Heart2h 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)

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Multiple Choice

An enlarged R wave on an ECG would indicate __________.

repolarization abnormalities

a myocardial infarction

an enlarged ventricle

cardiac ischemia

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Verified step by step guidance

Understand the context of an ECG (Electrocardiogram) and what it measures: An ECG records the electrical activity of the heart over a period of time using electrodes placed on the skin.

Identify the components of an ECG: The main components include the P wave, QRS complex, and T wave. The R wave is part of the QRS complex, which represents ventricular depolarization.

Analyze what an enlarged R wave signifies: An enlarged R wave can indicate increased muscle mass in the ventricles, often due to hypertrophy.

Connect the enlarged R wave to potential conditions: Ventricular hypertrophy can occur due to conditions like hypertension or valve disease, leading to an enlarged ventricle.

Conclude that an enlarged R wave on an ECG is indicative of an enlarged ventricle, as the increased muscle mass results in a stronger electrical signal, thus a larger R wave.