Cardiology Exam 2 Practice Questions with correct
answers
In sinus arrhythmia, a gradual increasing of the heart rate is usually associated with _____.
a. expiration
b. inspiration
c. excessive caffeine intake
d. early signs of heart failure CORRECT ANSWER ANS: B
Sinus arrhythmia that is associated with the phases of breathing and changes in intrathoracic pressure is called respiratory sinus arrhythmia. The rhythm is irregular; the heart rate increases gradually during inspiration (R-R intervals shorten) and decreases with expiration (R-R intervals lengthen).
The rate of sinus tachycardia is _____ beats/min.
a. slower than 60 b. 40 to 80
c. 60 to 100 d. faster than 100 CORRECT ANSWER ANS: D
The rate of sinus tachycardia is between 101 and 180 beats/min.
An ECG rhythm strip shows a ventricular rate of 46 bpm, a regular rhythm, a PR interval of 0.14 seconds, a QRS duration of 0.06 seconds, and one upright P wave before each QRS. This rhythm
is _____.
a. sinus rhythm
b. sinus bradycardia
c. sinus arrest
d. sinoatrial block CORRECT ANSWER ANS: B
The rhythm described fits the ECG criteria for a sinus bradycardia. An ECG rhythm strip shows a ventricular rate of 128 bpm, a regular rhythm, a PR interval of 0.16 seconds, a QRS duration of 0.08 seconds, and one upright P wave before each QRS. This rhythm is sinus _____.
a. arrhythmia
b. bradycardia
c. rhythm
d. tachycardia CORRECT ANSWER ANS: D
The rhythm described fits the ECG criteria for a sinus tachycardia.
Which of the following are possible causes of sinus tachycardia?
a. Hypothermia, hypovolemia
b. Hypoxia, calcium channel blocker overdose
c. Fever, pain, anxiety
d. Vomiting, vagal maneuvers CORRECT ANSWER ANS: C
Causes of sinus tachycardia include: acute myocardial infarction; caffeine-containing beverages;
dehydration, hypovolemia; drugs such as cocaine, amphetamines, ecstasy, cannabis; exercise; fear and anxiety; fever; heart failure; hyperthyroidism; hypoxia; infection; medications such as epinephrine, atropine, and dopamine; nicotine; pain; pulmonary embolism; shock; sympathetic stimulation.
Which of the following are possible causes of sinus bradycardia?
a. Elevated temperature, pain
b. Increased intracranial pressure, beta-blocker overdose
c. Hypoxia, fright, caffeine-containing beverages
d. Hypovolemia, administration of sympathomimetics CORRECT ANSWER ANS: B
Causes of sinus bradycardia include: disease of the SA node; hyperkalemia; hypokalemia; hypothermia; hypothyroidism; hypoxia; increased intracranial pressure; inferior myocardial infarction (MI); medications such as calcium channel blockers, digitalis, beta-blockers, amiodarone, and sotalol; obstructive sleep apnea; post heart transplant; posterior MI; and vagal stimulation. The rate of a sinus rhythm is ____ beats/min.
a. slower than 60
b. 60 to 100 c. 80 to 120
d. faster than 100 CORRECT ANSWER ANS: B
The rate of a sinus rhythm is between 60 and 100 beats/min.
Which of the following may cause a sinus bradycardia?
a. Stress or anxiety
b. Increased sympathetic tone
c. Fever
d. Hypothermia CORRECT ANSWER ANS: D
Causes of sinus bradycardia include: disease of the SA node; hyperkalemia; hypokalemia; hypothermia; hypothyroidism; hypoxia; increased intracranial pressure; inferior myocardial infarction (MI); medications such as calcium channel blockers, digitalis, beta-blockers, amiodarone, and sotalol; obstructive sleep apnea; post heart transplant; posterior MI; and vagal stimulation.
Which of the following correctly reflects the ECG criteria for a sinus rhythm?
a. More P waves than QRS complexes
b. P waves that look alike and upright in lead II, one before each QRS complex
c. Irregular atrial and ventricular rhythm
d. PR interval exceeding 0.20 seconds CORRECT ANSWER ANS: B
Characteristics of sinus rhythm:
Rhythm R-R and P-P intervals are regular
Rate 60 to 100 beats/min
P waves Positive (upright) in lead II; one precedes each QRS complex; P waves look alike
answers
In sinus arrhythmia, a gradual increasing of the heart rate is usually associated with _____.
a. expiration
b. inspiration
c. excessive caffeine intake
d. early signs of heart failure CORRECT ANSWER ANS: B
Sinus arrhythmia that is associated with the phases of breathing and changes in intrathoracic pressure is called respiratory sinus arrhythmia. The rhythm is irregular; the heart rate increases gradually during inspiration (R-R intervals shorten) and decreases with expiration (R-R intervals lengthen).
The rate of sinus tachycardia is _____ beats/min.
a. slower than 60 b. 40 to 80
c. 60 to 100 d. faster than 100 CORRECT ANSWER ANS: D
The rate of sinus tachycardia is between 101 and 180 beats/min.
An ECG rhythm strip shows a ventricular rate of 46 bpm, a regular rhythm, a PR interval of 0.14 seconds, a QRS duration of 0.06 seconds, and one upright P wave before each QRS. This rhythm
is _____.
a. sinus rhythm
b. sinus bradycardia
c. sinus arrest
d. sinoatrial block CORRECT ANSWER ANS: B
The rhythm described fits the ECG criteria for a sinus bradycardia. An ECG rhythm strip shows a ventricular rate of 128 bpm, a regular rhythm, a PR interval of 0.16 seconds, a QRS duration of 0.08 seconds, and one upright P wave before each QRS. This rhythm is sinus _____.
a. arrhythmia
b. bradycardia
c. rhythm
d. tachycardia CORRECT ANSWER ANS: D
The rhythm described fits the ECG criteria for a sinus tachycardia.
Which of the following are possible causes of sinus tachycardia?
a. Hypothermia, hypovolemia
b. Hypoxia, calcium channel blocker overdose
c. Fever, pain, anxiety
d. Vomiting, vagal maneuvers CORRECT ANSWER ANS: C
Causes of sinus tachycardia include: acute myocardial infarction; caffeine-containing beverages;
dehydration, hypovolemia; drugs such as cocaine, amphetamines, ecstasy, cannabis; exercise; fear and anxiety; fever; heart failure; hyperthyroidism; hypoxia; infection; medications such as epinephrine, atropine, and dopamine; nicotine; pain; pulmonary embolism; shock; sympathetic stimulation.
Which of the following are possible causes of sinus bradycardia?
a. Elevated temperature, pain
b. Increased intracranial pressure, beta-blocker overdose
c. Hypoxia, fright, caffeine-containing beverages
d. Hypovolemia, administration of sympathomimetics CORRECT ANSWER ANS: B
Causes of sinus bradycardia include: disease of the SA node; hyperkalemia; hypokalemia; hypothermia; hypothyroidism; hypoxia; increased intracranial pressure; inferior myocardial infarction (MI); medications such as calcium channel blockers, digitalis, beta-blockers, amiodarone, and sotalol; obstructive sleep apnea; post heart transplant; posterior MI; and vagal stimulation. The rate of a sinus rhythm is ____ beats/min.
a. slower than 60
b. 60 to 100 c. 80 to 120
d. faster than 100 CORRECT ANSWER ANS: B
The rate of a sinus rhythm is between 60 and 100 beats/min.
Which of the following may cause a sinus bradycardia?
a. Stress or anxiety
b. Increased sympathetic tone
c. Fever
d. Hypothermia CORRECT ANSWER ANS: D
Causes of sinus bradycardia include: disease of the SA node; hyperkalemia; hypokalemia; hypothermia; hypothyroidism; hypoxia; increased intracranial pressure; inferior myocardial infarction (MI); medications such as calcium channel blockers, digitalis, beta-blockers, amiodarone, and sotalol; obstructive sleep apnea; post heart transplant; posterior MI; and vagal stimulation.
Which of the following correctly reflects the ECG criteria for a sinus rhythm?
a. More P waves than QRS complexes
b. P waves that look alike and upright in lead II, one before each QRS complex
c. Irregular atrial and ventricular rhythm
d. PR interval exceeding 0.20 seconds CORRECT ANSWER ANS: B
Characteristics of sinus rhythm:
Rhythm R-R and P-P intervals are regular
Rate 60 to 100 beats/min
P waves Positive (upright) in lead II; one precedes each QRS complex; P waves look alike
