Questions and Answers
What does the P wave represent?
What does the Q of QRS complex represent?
Depolarization of the interventricular septum
What does the R of QRS complex represent?
Ventricular depolarization
What does the S of QRS complex represent?
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What does the T wave represent?
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What does the QT interval indicate?
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What is the ST segment?
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What is an EKG?
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What does the QRS complex represent?
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What is the duration of the PR interval?
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Study Notes
EKG Terms and Definitions
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P wave: Represents atrial depolarization, the initial electrical activity in the heart that triggers atrial contraction.
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Q wave (of QRS complex): Indicates depolarization of the interventricular septum, crucial for proper ventricular functioning.
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R wave (of QRS complex): Represents ventricular depolarization. This wave reflects the main electrical stimulus that passes through thick ventricular walls, requiring higher voltage.
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S wave (of QRS complex): Signifies depolarization of the Purkinje fibers, which are essential for coordinated ventricular contraction.
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T wave: Represents ventricular repolarization, signaling the end of electrical activity in the ventricles, and marks the initiation of ventricular diastole, where refilling occurs.
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QT interval: Duration of ventricular contraction, encompassing both depolarization and repolarization phases in the ventricular cycle.
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ST segment: A flat line between the end of the QRS complex and the beginning of the T wave. Key for assessing myocardial ischemia and necrosis when deviations occur.
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EKG (Electrocardiogram): A graphical representation of the sequence of electrical conduction through the heart muscles, indicating cardiac activity.
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QRS complex: Represents the combined electrical activity during ventricular depolarization and indicates silent atrial repolarization occurring simultaneously.
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PR interval: Duration of 0.18 seconds, measured from the beginning of the P wave to the beginning of the QRS complex, reflecting the time taken for electrical impulses to travel from the atria to the ventricles.
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Description
Test your knowledge of EKG terminology with this quiz focused on key terms like P wave, QRS complex, and T wave. Understanding these terms is crucial for anyone studying cardiovascular physiology and rhythm analysis. Dive into the world of electrocardiograms and enhance your cardiac knowledge.
