PNG 2251 Health And Illness: ECG Understanding
Exam Questions With Verified Answers
depolarization of the atria - ANSWER What does the P wave represent?
depolarization of the ventricles - ANSWER What does the QRS complex
represent?
repolarization of the ventricles - ANSWER What does the T wave
represent?
repolarization of the purkinje fibers - ANSWER what does the U wave (if
present) represent?
continuous monitoring or with procedural sedation - ANSWER when would
the use of a 3-lead ECG be most appropriate?
one - ANSWER how many seconds is each little box on a rhythm strip?
12 lead ECG - ANSWER this may show structural changes with ischemia,
infarction or enlarged chambers of the heart, it is also helpful in the
detection of dysrhythmias
they are evolving in an MI - ANSWER what does it mean if the ST segment
is abnormal?
hyperkalemia - ANSWER if the T wave is the same height as the QRS
complex what may it indicate. (normally it is about half the size)
Artifact - ANSWER this is from a muscle tremor, movement or loose
electrodes, it is not an accurate tracing of cardiac rhythm
, telemetry - ANSWER observation or HR and rhythm at a distant site
normal sinus rhythm - ANSWER heart beats at 60-100pbm and follows a
normal conduction pattern
Dysrhythmias - ANSWER abnormal cardiac rhythms
Holter monitoring - ANSWER this is a 5 lead device, the patient must keep
an activity diary, it records all events and lasts about 24-48 hours
Event Recorder Monitoring - ANSWER this device only records abnormal
cardiac events
Sinus Bradycardia - ANSWER heart beats less than 60bpm
IV atropine or a pacemaker - ANSWER What are some treatments for
Sinus bradycardia?*
carotid massage, hypothermia, increased vagal response,
parasympathomimetic drugs, ICP, Hypothyroidism - ANSWER What are
some reasons Sinus Bradycardia might occur?
Sinus Tachycardia - ANSWER discharge rate from the sinus node is
increase as a result of vagal inhibition and is 100bpm
excercise, pain, hypovolemia, anxiety, fever, heart failure, MI, Myocardial
ischemia - ANSWER What are some reasons Sinus Tachycardia may
occur?
Antipyretic for fever, beta blockers, and analgesics - ANSWER What are
some treatments for Sinus Tachycardia?*
A-fib - ANSWER what is the most common abnormal heart rhythm seen
with stroke?*
atrial flutter - ANSWER atrial tachycardia dysrhythmia identified bt recurring
saw tooth shaped waves, it originates from a single ectopic focus
Exam Questions With Verified Answers
depolarization of the atria - ANSWER What does the P wave represent?
depolarization of the ventricles - ANSWER What does the QRS complex
represent?
repolarization of the ventricles - ANSWER What does the T wave
represent?
repolarization of the purkinje fibers - ANSWER what does the U wave (if
present) represent?
continuous monitoring or with procedural sedation - ANSWER when would
the use of a 3-lead ECG be most appropriate?
one - ANSWER how many seconds is each little box on a rhythm strip?
12 lead ECG - ANSWER this may show structural changes with ischemia,
infarction or enlarged chambers of the heart, it is also helpful in the
detection of dysrhythmias
they are evolving in an MI - ANSWER what does it mean if the ST segment
is abnormal?
hyperkalemia - ANSWER if the T wave is the same height as the QRS
complex what may it indicate. (normally it is about half the size)
Artifact - ANSWER this is from a muscle tremor, movement or loose
electrodes, it is not an accurate tracing of cardiac rhythm
, telemetry - ANSWER observation or HR and rhythm at a distant site
normal sinus rhythm - ANSWER heart beats at 60-100pbm and follows a
normal conduction pattern
Dysrhythmias - ANSWER abnormal cardiac rhythms
Holter monitoring - ANSWER this is a 5 lead device, the patient must keep
an activity diary, it records all events and lasts about 24-48 hours
Event Recorder Monitoring - ANSWER this device only records abnormal
cardiac events
Sinus Bradycardia - ANSWER heart beats less than 60bpm
IV atropine or a pacemaker - ANSWER What are some treatments for
Sinus bradycardia?*
carotid massage, hypothermia, increased vagal response,
parasympathomimetic drugs, ICP, Hypothyroidism - ANSWER What are
some reasons Sinus Bradycardia might occur?
Sinus Tachycardia - ANSWER discharge rate from the sinus node is
increase as a result of vagal inhibition and is 100bpm
excercise, pain, hypovolemia, anxiety, fever, heart failure, MI, Myocardial
ischemia - ANSWER What are some reasons Sinus Tachycardia may
occur?
Antipyretic for fever, beta blockers, and analgesics - ANSWER What are
some treatments for Sinus Tachycardia?*
A-fib - ANSWER what is the most common abnormal heart rhythm seen
with stroke?*
atrial flutter - ANSWER atrial tachycardia dysrhythmia identified bt recurring
saw tooth shaped waves, it originates from a single ectopic focus
