Questions and Answers
What does an electrocardiogram record?
What is the period during which the atria are depolarizing called?
P wave
During which phase do the ventricles repolarize?
T wave
What does the QRS wave represent?
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What is bradycardia?
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What is fibrillation?
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What is tachycardia?
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What causes heart block?
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What is angina pectoris?
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Study Notes
Electrocardiogram
- Recording of the heart's electrical activity.
- Important tool for diagnosing heart conditions and assessing heart health.
P Wave
- Indicates atrial depolarization.
- Represents the electrical activity associated with the contraction of the atria.
T Wave
- Represents ventricular repolarization.
- Occurs after ventricular contraction, indicating recovery of the ventricles.
QRS Wave
- Signifies ventricular depolarization, leading to contraction.
- Appears after the P wave and before the T wave in an electrocardiogram.
Bradycardia
- Defined as a heart rate below 60 beats per minute.
- Can indicate issues such as heart disease or response to medication.
Fibrillation
- A chaotic and uncoordinated heart rhythm.
- Results in ineffective pumping of blood, posing serious health risks.
Tachycardia
- Characterized by a heart rate exceeding 100 beats per minute.
- May be caused by stress, heart conditions, or stimulants.
Heart Block
- Involves damage to the AV node, affecting the heart's electrical conduction.
- Can be complete or partial, disrupting communication between atria and ventricles.
Angina Pectoris
- Chest pain caused by reduced blood flow to the myocardium.
- Often a symptom of underlying heart disease or ischemia.
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Description
Test your knowledge of the circulatory system with this flashcard quiz based on Chapter 11. Learn key terms such as electrocardiogram and various heart waves including P wave, QRS wave, and T wave. Enhance your understanding of heart activities and electrical recordings.
