ECG Flashcards
What does ECG stand for?
Electrocardiogram
True or False: An ECG can help diagnose heart conditions.
True
Fill in the blank: The normal heart rate range for adults is ____ beats per minute.
60 to 100
What is the primary purpose of an ECG?
To record the electrical activity of the heart.
Which wave represents atrial depolarization in an ECG?
P wave
What does the QRS complex represent?
Ventricular depolarization
Fill in the blank: The ST segment is assessed for elevation or depression to evaluate for ____.
Myocardial ischemia
Multiple choice: Which of the following is NOT a component of the ECG waveform? A) P wave B) QRS complex C) T wave D) U wave E) X wave
E) X wave
What is the significance of the T wave in an ECG?
It represents ventricular repolarization.
True or False: A flat T wave can indicate myocardial ischemia.
True
What does a prolonged QT interval suggest?
Increased risk of arrhythmias
Multiple choice: Which rhythm is characterized by a regularly irregular pattern? A) Atrial fibrillation B) Ventricular tachycardia C) Sinus arrhythmia D) Normal sinus rhythm
C) Sinus arrhythmia
What is the typical time duration of a normal QRS complex?
0.06 to 0.10 seconds
Fill in the blank: The PR interval measures the time from the onset of the ____ to the onset of the ____.
P wave; QRS complex
True or False: Atrial fibrillation is characterized by a regular R-R interval.
False
What does the term ‘arrhythmia’ refer to?
An irregular heartbeat.
Multiple choice: In which condition would you expect to see a ‘sawtooth’ pattern in the ECG? A) Atrial flutter B) Ventricular fibrillation C) Myocardial infarction D) Normal sinus rhythm
A) Atrial flutter
What is the significance of the U wave in an ECG?
It may represent repolarization of the Purkinje fibers.
Fill in the blank: The heart’s electrical impulse originates in the ____ node.
Sinoatrial (SA)
What does a ‘wide QRS complex’ indicate?
Abnormal ventricular conduction.
True or False: Ischemic changes can be seen in the ST segment.
True
What is the normal duration of the PR interval?
0.12 to 0.20 seconds
Multiple choice: Which of the following rhythms is characterized by a rapid heart rate and a narrow QRS complex? A) Atrial fibrillation B) Supraventricular tachycardia C) Ventricular tachycardia D) Sinus bradycardia
B) Supraventricular tachycardia
What does a ‘J point’ refer to in an ECG?
The point where the QRS complex meets the ST segment.
True or False: The heart’s electrical conduction system includes the AV node.
True
Fill in the blank: The left and right bundle branches are part of the ____ system.
His-Purkinje
