Cardiology Final Exam Review(Correct answers)
An ECG shows a heart rate of 110 and regular, with no P waves, and QRS duration of 0.10. This
rhythm is most likely: correct answersjunctional tachycardia
Stimulation of the Vagus nerve, as a part of the parasympathetic nervous system, will: correct
answersslow the release of impulses from the SA node
A P-R interval of 0.08 seconds is _______ and would______. correct answerstoo short, decrease
the volume pumped by the atria
During diastole, which of the following valves is closed? correct answerspulmonic
The sodium - potassium (Na+ - K+) pump: correct answersrequires an adenosine phosphate
molecule for energy
A depolarization impulse moves from cell to cell in the myocardium: correct answersthrough gap
junctions in the intercalated discs between cells
You have just resuscitated a patient who was in cardiac arrest. You see a regular rhythm on the
monitor with wide QRS complexes and no P waves at a rate of 58. The patient has a pulse that
matches the rhythm. You patient's rhythm is most likely: correct answersAccelerated
Idioventricular rhythm
The relative refractory period is from the: correct answersapex of the T wave to the end of the T
wave
Artificial implanted pacemakers may be identified on the ECG by: correct answersvertical spikes
before each QRS complex
Scenario: EMS is called to the scene of a 78-year-old female with a history of heart and lung
disease. After placing her on the monitor, you note that the rhythm is slightly irregular with
normal QRS complexes, but each P wave is slightly different shaped. This rhythm is most likely:
correct answerswandering atrial pacemaker
The PR interval represents: correct answersatrial depolarization
Your elderly cardiac patient has an irregularly irregular pulse at a rate of about 80. When you
place him on the monitor, you see normal QRS complexes but cannot see P waves due to all of
the activity that looks like artifact on the baseline. Your patient's rhythm is most likely: correct
answersAtrial Fibrillation
A rhythm with gradually increasing P-R intervals leading to an absent QRS complex and
repeating this pattern would be most likely be identified as: correct answersWenckebach
The phase of the cardiac cycle when the fast Na+ channels are open is: correct answersphase 0
, You patient has a long history of COPD and is complaining of respiratory difficulty. When you
attach the monitor you see an irregular rhythm at a rate of 140 with normal QRS complexes. You
notice that there are at least 6 different shapes of P waves but the PR intervals are all within
normal limits. Your patient is most likely in which rhythm? correct answersMultifocal Atrial
Tachycardia
Your patient is complaining of her heart 'fluttering' in her chest. When you attach the monitor
you see a regular rhythm with normal QRS complexes and a ventricular rate of 160. When you
look for P waves however, you are unable to see any. The patient's rhythm is most likely: correct
answersSupraventricular Tachycardia
A rhythm with multiple pointed P waves before each QRS is most likely: correct answersatrial
flutter
You arrive on scene to find an elderly patient unconscious in bed with an obvious line of lividity.
When you attach the monitor you see a flat line with an occasional up and down wave about
every 6 to 8 seconds. This rhythm is most likely: correct answersAgonal rhythm
In a lead III tracing the negative electrode is located on the: correct answersleft arm
Which heart block is characterized by a consistent P-R interval greater than 0.20, normal
conduction, and a normal QRS duration? correct answers1st-degree AV block
You have just converted your patient out of SVT. You now see a regular rhythm at a rate of 78
with normal P waves, but you notice that the QRS begins immediately at the end of the P making
the PR interval just less than 0.12 seconds. The QRS is also 0.16 seconds long. Your patient's
rhythm is most likely: correct answersSinus rhythm with WPW
The best mathematical means to understand blood pressure is: correct answersblood pressure =
stroke volume x heart rate x systemic vascular resistance
Comparing the morphology (shape) of successive P waves or QRS waves will indicate: correct
answersthe origin of the waves
According to the _____, the more the myocardial muscle is stretched, the greater its force of
contraction will be: correct answersFrank - Starling Law
Adenosine Diphosphate correct answerscan be used to release or store energy in the cell
A QRS complex should last: correct answersbetween 0.08 and 0.12 seconds
The coronary arteries receive blood: correct answersduring all of ventricular diastole
Blood enters the left atrium from the: correct answerspulmonary veins
An ECG shows a heart rate of 110 and regular, with no P waves, and QRS duration of 0.10. This
rhythm is most likely: correct answersjunctional tachycardia
Stimulation of the Vagus nerve, as a part of the parasympathetic nervous system, will: correct
answersslow the release of impulses from the SA node
A P-R interval of 0.08 seconds is _______ and would______. correct answerstoo short, decrease
the volume pumped by the atria
During diastole, which of the following valves is closed? correct answerspulmonic
The sodium - potassium (Na+ - K+) pump: correct answersrequires an adenosine phosphate
molecule for energy
A depolarization impulse moves from cell to cell in the myocardium: correct answersthrough gap
junctions in the intercalated discs between cells
You have just resuscitated a patient who was in cardiac arrest. You see a regular rhythm on the
monitor with wide QRS complexes and no P waves at a rate of 58. The patient has a pulse that
matches the rhythm. You patient's rhythm is most likely: correct answersAccelerated
Idioventricular rhythm
The relative refractory period is from the: correct answersapex of the T wave to the end of the T
wave
Artificial implanted pacemakers may be identified on the ECG by: correct answersvertical spikes
before each QRS complex
Scenario: EMS is called to the scene of a 78-year-old female with a history of heart and lung
disease. After placing her on the monitor, you note that the rhythm is slightly irregular with
normal QRS complexes, but each P wave is slightly different shaped. This rhythm is most likely:
correct answerswandering atrial pacemaker
The PR interval represents: correct answersatrial depolarization
Your elderly cardiac patient has an irregularly irregular pulse at a rate of about 80. When you
place him on the monitor, you see normal QRS complexes but cannot see P waves due to all of
the activity that looks like artifact on the baseline. Your patient's rhythm is most likely: correct
answersAtrial Fibrillation
A rhythm with gradually increasing P-R intervals leading to an absent QRS complex and
repeating this pattern would be most likely be identified as: correct answersWenckebach
The phase of the cardiac cycle when the fast Na+ channels are open is: correct answersphase 0
, You patient has a long history of COPD and is complaining of respiratory difficulty. When you
attach the monitor you see an irregular rhythm at a rate of 140 with normal QRS complexes. You
notice that there are at least 6 different shapes of P waves but the PR intervals are all within
normal limits. Your patient is most likely in which rhythm? correct answersMultifocal Atrial
Tachycardia
Your patient is complaining of her heart 'fluttering' in her chest. When you attach the monitor
you see a regular rhythm with normal QRS complexes and a ventricular rate of 160. When you
look for P waves however, you are unable to see any. The patient's rhythm is most likely: correct
answersSupraventricular Tachycardia
A rhythm with multiple pointed P waves before each QRS is most likely: correct answersatrial
flutter
You arrive on scene to find an elderly patient unconscious in bed with an obvious line of lividity.
When you attach the monitor you see a flat line with an occasional up and down wave about
every 6 to 8 seconds. This rhythm is most likely: correct answersAgonal rhythm
In a lead III tracing the negative electrode is located on the: correct answersleft arm
Which heart block is characterized by a consistent P-R interval greater than 0.20, normal
conduction, and a normal QRS duration? correct answers1st-degree AV block
You have just converted your patient out of SVT. You now see a regular rhythm at a rate of 78
with normal P waves, but you notice that the QRS begins immediately at the end of the P making
the PR interval just less than 0.12 seconds. The QRS is also 0.16 seconds long. Your patient's
rhythm is most likely: correct answersSinus rhythm with WPW
The best mathematical means to understand blood pressure is: correct answersblood pressure =
stroke volume x heart rate x systemic vascular resistance
Comparing the morphology (shape) of successive P waves or QRS waves will indicate: correct
answersthe origin of the waves
According to the _____, the more the myocardial muscle is stretched, the greater its force of
contraction will be: correct answersFrank - Starling Law
Adenosine Diphosphate correct answerscan be used to release or store energy in the cell
A QRS complex should last: correct answersbetween 0.08 and 0.12 seconds
The coronary arteries receive blood: correct answersduring all of ventricular diastole
Blood enters the left atrium from the: correct answerspulmonary veins
