Relias Assessments Assistance Material
Dysrhythmias Questions with Correct Answers
Graded A+ 2026
EKG interpretation ANSWER >>> One of the most useful and commonly used
diagnostic tools is electrocardiography (EKG) which measures the heart's electrical
activity as waveforms. An EKG uses electrodes attached to the skin to detect electric
current moving through the heart. These signals are transmitted to produce a record of
cardiac activity. Arrhythmia or dysrhythmia are disturbances in the normal cardiac
rhythm of the heart which occurs as a result of alterations within the conduction of
electrical impulses. These impulses stimulate and coordinate atrial and ventricular
myocardial contractions that provide cardiac output.
Sinus Tachycardia ANSWER >>> Sinus tachycardia is a heart rate greater than 100
beats per minute that originated from the sinus node.
Rate: 100 to 180 beats per minute
1
, P Waves precede each QRS complex
PR interval is normal
QRS complex is normal
Conduction is normal
Rhythm is regular
Causes of sinus tachycardia may include exercise, anxiety, fever, drugs, anemia, heart
failure, hypovolemia and shock. Sinus tachycardia is often asymptomatic. Management
however is directed at the treatment of the primary cause. Carotid sinus pressure
(carotid massage) or a beta blocker may be used to reduce heart rate.
Sinus Bradycardia ANSWER >>> Sinus bradycardia is a heart rate less than 60 beats
per minute and originates from the sinus node (as the term "sinus" refers to sinoatrial
node). It has the following characteristics
Rate is less than 60 beats per minute
P Waves precede each QRS complex
PR interval is normal
QRS complex is normal
Conduction is normal
Rhythm is regular
2
Dysrhythmias Questions with Correct Answers
Graded A+ 2026
EKG interpretation ANSWER >>> One of the most useful and commonly used
diagnostic tools is electrocardiography (EKG) which measures the heart's electrical
activity as waveforms. An EKG uses electrodes attached to the skin to detect electric
current moving through the heart. These signals are transmitted to produce a record of
cardiac activity. Arrhythmia or dysrhythmia are disturbances in the normal cardiac
rhythm of the heart which occurs as a result of alterations within the conduction of
electrical impulses. These impulses stimulate and coordinate atrial and ventricular
myocardial contractions that provide cardiac output.
Sinus Tachycardia ANSWER >>> Sinus tachycardia is a heart rate greater than 100
beats per minute that originated from the sinus node.
Rate: 100 to 180 beats per minute
1
, P Waves precede each QRS complex
PR interval is normal
QRS complex is normal
Conduction is normal
Rhythm is regular
Causes of sinus tachycardia may include exercise, anxiety, fever, drugs, anemia, heart
failure, hypovolemia and shock. Sinus tachycardia is often asymptomatic. Management
however is directed at the treatment of the primary cause. Carotid sinus pressure
(carotid massage) or a beta blocker may be used to reduce heart rate.
Sinus Bradycardia ANSWER >>> Sinus bradycardia is a heart rate less than 60 beats
per minute and originates from the sinus node (as the term "sinus" refers to sinoatrial
node). It has the following characteristics
Rate is less than 60 beats per minute
P Waves precede each QRS complex
PR interval is normal
QRS complex is normal
Conduction is normal
Rhythm is regular
2
