MODULE 9 Flashcards
(58 cards)
What does EKG stand for?
Electrocardiogram
True or False: An EKG measures the electrical activity of the heart.
True
Fill in the blank: The _____ is the part of the heart that receives deoxygenated blood.
right atrium
What is the normal heart rate range for adults?
60 to 100 beats per minute
What does the P wave represent in an EKG?
Atrial depolarization
True or False: The QRS complex represents ventricular repolarization.
False
What is the primary purpose of a stress test?
To assess how the heart performs under physical stress
Multiple choice: Which of the following is a common indication for an EKG? A) Chest pain B) Headache C) Fever
A) Chest pain
Fill in the blank: The _____ node is known as the heart’s natural pacemaker.
sinoatrial (SA)
What does the T wave represent in an EKG?
Ventricular repolarization
True or False: A standard EKG has 12 leads.
True
What is the purpose of a Holter monitor?
To continuously record heart activity over 24 to 48 hours
Fill in the blank: The _____ interval measures the time from the beginning of atrial depolarization to the beginning of ventricular depolarization.
PR
What does an elevated ST segment indicate?
Possible myocardial infarction
Multiple choice: Which of the following conditions can an EKG help diagnose? A) Diabetes B) Hypertension C) Arrhythmias
C) Arrhythmias
True or False: The QT interval varies with heart rate.
True
What is the role of the AV node in the heart?
To delay the electrical signal before it enters the ventricles
Fill in the blank: The _____ is the outer layer of the heart.
epicardium
What is the significance of the U wave in an EKG?
It may represent ventricular repolarization, but its significance is often unclear.
Multiple choice: Which lead is typically used to monitor the heart’s rhythm continuously? A) Lead I B) Lead II C) Lead III
B) Lead II
True or False: EKGs can be performed without any special preparation.
False
What does the term ‘arrhythmia’ refer to?
An irregular heartbeat
Fill in the blank: The _____ is the muscular layer of the heart.
myocardium
What is the purpose of an echocardiogram?
To visualize the heart’s structure and function using ultrasound