Paramedic Cardiology Final(Correctly solved)
A prolonged PR interval: correct answersindicates an abnormal delay at the AV node.
A prolonged QT interval that the heart: correct answersis experiencing an extended refractory
period, making the ventricles more vulnerable to dysrhythmias.
According to the Einthoven triangle, lead II is assessed by placing the: correct answersnegative
lead on the right arm and the positive lead on the left leg.
Hypokalemia impacts cardiac function in which of the following ways? correct answersincreased
myocardial irritability
If a particular interval on the ECG graph paper is 1.5 small boxes in width, the interval would be
measured as: correct answers0.06 seconds
If the heart's secondary pacemaker becomes ischemic and fails to initiate an electrical impulse:
correct answersyou should expect to see a heart rate slower than 40 beats/min.
In order to ensure proper electrolyte distribution and maintain the polarity of the cell membrane,
the sodium-potassium pump moves: correct answerstwo potassium ions into the cell for every
three sodium ions it moves out of the cell.
It is always necessary to evaluate a cardiac dysrhythmia in the context of the: correct answerspts.
overall l clinical condition.
When analyzing a cardiac rhythm strip in lead II, you should routinely evaluate which of the
following components? correct answersR-R interval
Which of the following electrolytes maintains the depolarization phase? correct answersCalcium
An electrical impulse is slightly delayed at the AV node so that the: correct answersatria can
empty into the ventricles.
If a pts. ECG rhythm shows any artifact, you should: correct answersensure the electrodes are
applied firmly to the skin.
On the ECG graph paper, amplitude is measured in: correct answersmillimeters
The duration of the QRS complex should be how many milliseconds or less in a healthy adult?
correct answers110
The P wave represents: correct answersatrial depolarization
The second half of the T wave: correct answersrepresents a vulnerable period during which a
strong impulse could cause depolarization, resulting in a lethal dysrhythmia.
, When applying the precordial leads, Lead V1 should be placed in the: correct answersfourth
intercostal space at the right sternal border.
When monitoring a pts. cardiac rhythm, it is important to remember that: correct answersthe
ECG dose not provide data regarding the pts. cardiac output.
Which of the following ECG waveforms represents ventricular depolarization? correct
answersQRS complex
Which of the following statements regarding the SA node is correct? correct answersThe SA
node is the dominant cardiac pacemaker in healthy pts.
A 70 y/o woman remains in asystole following 10 minutes of well-coordinated CPR, successful
intubation, IV therapy, and three doses of epinephrine. There are no obvious underlying causes
that would explain her cardiac arrest. at this point, it would be appropriate to: correct
answersseriously consider ceasing resuscitative efforts.
A first-degree heart block has a prolonged PR interval because: correct answerseach impulse that
reaches the AV node is delayed slightly longer than expected.
An accelerated idioventricular rhythm is characterized by which of the following? correct
answersWide QRS complexes with no identifiable P waves
Electrical capture during transcutaneous cardiac pacing is characterized by: correct answersa
pacemaker spike followed by a wide QRS complex.
If an impulse generated by the AV node begins moving upward through the atria before the other
part of it enters the ventricles: correct answersan inverted P wave will appear before the QRS
complex.
In contrast to treatment for supraventricular tachycardia, treatment for multifocal atrial
tachycardia in the prehospital setting: correct answersis generally not effective
Regardless of the pts. presenting cardiac arrest rhythm, the first IV or IO drug that should be
given is: correct answersa vasopressor
When caring for an unresponsive, clinically unstable pt. symptomatic bradycardia, what is the
most immediate priority? correct answersEnsuring adequate ventilation and oxygenation
Which of the following statements regarding second-degree heart block is correct? correct
answersSecond-degree heart block occurs when an impulse reaching the AV node is occasionally
prevented from proceeding to the ventricle and causing a QRS complex.
You can briefly interrupt CPR to perform which of the following? correct answersCardiac
rhythm assessment
A prolonged PR interval: correct answersindicates an abnormal delay at the AV node.
A prolonged QT interval that the heart: correct answersis experiencing an extended refractory
period, making the ventricles more vulnerable to dysrhythmias.
According to the Einthoven triangle, lead II is assessed by placing the: correct answersnegative
lead on the right arm and the positive lead on the left leg.
Hypokalemia impacts cardiac function in which of the following ways? correct answersincreased
myocardial irritability
If a particular interval on the ECG graph paper is 1.5 small boxes in width, the interval would be
measured as: correct answers0.06 seconds
If the heart's secondary pacemaker becomes ischemic and fails to initiate an electrical impulse:
correct answersyou should expect to see a heart rate slower than 40 beats/min.
In order to ensure proper electrolyte distribution and maintain the polarity of the cell membrane,
the sodium-potassium pump moves: correct answerstwo potassium ions into the cell for every
three sodium ions it moves out of the cell.
It is always necessary to evaluate a cardiac dysrhythmia in the context of the: correct answerspts.
overall l clinical condition.
When analyzing a cardiac rhythm strip in lead II, you should routinely evaluate which of the
following components? correct answersR-R interval
Which of the following electrolytes maintains the depolarization phase? correct answersCalcium
An electrical impulse is slightly delayed at the AV node so that the: correct answersatria can
empty into the ventricles.
If a pts. ECG rhythm shows any artifact, you should: correct answersensure the electrodes are
applied firmly to the skin.
On the ECG graph paper, amplitude is measured in: correct answersmillimeters
The duration of the QRS complex should be how many milliseconds or less in a healthy adult?
correct answers110
The P wave represents: correct answersatrial depolarization
The second half of the T wave: correct answersrepresents a vulnerable period during which a
strong impulse could cause depolarization, resulting in a lethal dysrhythmia.
, When applying the precordial leads, Lead V1 should be placed in the: correct answersfourth
intercostal space at the right sternal border.
When monitoring a pts. cardiac rhythm, it is important to remember that: correct answersthe
ECG dose not provide data regarding the pts. cardiac output.
Which of the following ECG waveforms represents ventricular depolarization? correct
answersQRS complex
Which of the following statements regarding the SA node is correct? correct answersThe SA
node is the dominant cardiac pacemaker in healthy pts.
A 70 y/o woman remains in asystole following 10 minutes of well-coordinated CPR, successful
intubation, IV therapy, and three doses of epinephrine. There are no obvious underlying causes
that would explain her cardiac arrest. at this point, it would be appropriate to: correct
answersseriously consider ceasing resuscitative efforts.
A first-degree heart block has a prolonged PR interval because: correct answerseach impulse that
reaches the AV node is delayed slightly longer than expected.
An accelerated idioventricular rhythm is characterized by which of the following? correct
answersWide QRS complexes with no identifiable P waves
Electrical capture during transcutaneous cardiac pacing is characterized by: correct answersa
pacemaker spike followed by a wide QRS complex.
If an impulse generated by the AV node begins moving upward through the atria before the other
part of it enters the ventricles: correct answersan inverted P wave will appear before the QRS
complex.
In contrast to treatment for supraventricular tachycardia, treatment for multifocal atrial
tachycardia in the prehospital setting: correct answersis generally not effective
Regardless of the pts. presenting cardiac arrest rhythm, the first IV or IO drug that should be
given is: correct answersa vasopressor
When caring for an unresponsive, clinically unstable pt. symptomatic bradycardia, what is the
most immediate priority? correct answersEnsuring adequate ventilation and oxygenation
Which of the following statements regarding second-degree heart block is correct? correct
answersSecond-degree heart block occurs when an impulse reaching the AV node is occasionally
prevented from proceeding to the ventricle and causing a QRS complex.
You can briefly interrupt CPR to perform which of the following? correct answersCardiac
rhythm assessment
