What is the significance of the U wave in an electrocardiogram?

The U wave is thought to represent repolarization of the Purkinje fibers, but its significance is not well understood.

What is the role of the AV node in the cardiac conduction system?

The AV node acts as a gatekeeper, slowing down the electrical signal before it enters the ventricles.

What does a prolonged QT interval indicate?

A prolonged QT interval can indicate an increased risk of arrhythmias.

What is the purpose of an electrocardiogram (ECG)?

An electrocardiogram (ECG) is used to assess the electrical activity of the heart and diagnose various cardiac conditions.

What does the term 'ventricular hypertrophy' refer to?

Ventricular hypertrophy refers to the thickening of the heart's ventricular walls, often due to increased workload.

What is the significance of heart rate variability (HRV)?

Heart rate variability (HRV) is a measure of the autonomic nervous system's regulation of the heart and can indicate overall health.

What does the term 'arrhythmia' mean?

Arrhythmia refers to an irregular heartbeat, which can be too fast, too slow, or erratic.

What is the role of the cardiac cycle in heart function?

The cardiac cycle refers to the sequence of events in one heartbeat, including contraction and relaxation of the heart chambers.

EKG Basics Flashcards

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15 questions

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1.

FLASHCARD QUESTION

Front

What does the QRS complex represent in an electrocardiogram?

Back

The QRS complex represents ventricular depolarization.

2.

FLASHCARD QUESTION

Front

Which wave is not normally seen on an electrocardiogram tracing?

Back

The U wave is not normally seen on an electrocardiogram tracing.

3.

FLASHCARD QUESTION

Front

What does the T wave represent in an electrocardiogram?

Back

The T wave represents ventricular repolarization.

4.

FLASHCARD QUESTION

Front

Where is the sinus node located in the heart?

Back

The sinus node is located in the right atrium.

5.

FLASHCARD QUESTION

Front

What is the normal firing rate of the sinoatrial node?

Back

The sinoatrial node normally fires 60 to 100 times per minute.

6.

FLASHCARD QUESTION

Front

What is the function of the P wave in an electrocardiogram?

Back

The P wave represents atrial depolarization.

7.

FLASHCARD QUESTION

Front

What does an elevated ST segment indicate?

Back

An elevated ST segment may indicate myocardial infarction or ischemia.

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