Sinus, Atrial, & Junctional Arrhythmias

Match the following

• QRS Complex

• Represents atrial depolarization

• PR Interval

• Time it takes for the impulse to travel from the atria to the ventricles

• Heart Rhythm

• Represents ventricular depolarization

• P Wave

• Number of beats per minute

• Heart Rate

• Pattern created by the heart beats

In normal sinus rhythm, the P wave is:

• Absent

• Present before every QRS Complex

• Inverted

• Irregular in size & shape

What is the normal range for the PR interval in a sinus rhythm?

• Not present

• .04 to 0.12 seconds

• 0.12 to 0.20 seconds

• 0.20 to 0.40 seconds

What is the normal duration of the QRS complex in a sinus rhythm?

• Less than 1 small box

• Less than 3 small boxes

• Less than 1 big box

• Less than 2 big boxes

Draw a sinus beat. (1 Sinus PQRST Complex)

Match the following

• Sinus Dysrrhythmia

• 
• Sinus Tachycardia

• 
• Sinus Arrest

• 
• Normal Sinus Rhythm

• 
• Sinus Bradycardia

• 

Match the following

• Normal Sinus Rhythm

• HR >100 BPM

• Sinus Arrest

• HR <60 BPM

• Sinus Dysrrhythmia

• Pause in the rhythm

• Sinus Tachycardia

• HR 60-100 BPM

• Sinus Bradycardia

• Irregular Rhythm

Match the following Sinus Rhythm to their common cause

• Sinus Tachycardia

• Healthy Adult

• Sinus Bradycardia

• Breathing pattern

• Normal Sinus Rhythm

• Exercise, pain, & stimulants

• Sinus Dysrrhythmia

• Beta & Calcium Channel Blockers

Which of the following is a characteristic feature of atrial flutter on an ECG?

• Sawtooth-like waves in place of P waves

• Wide QRS complexes with consistent intervals

• Heart rate below 60 beats per minute

• Irregularly irregular rhythm with no discernible P waves

Which of the following is a characteristic feature of atrial fibrillation on an ECG?

• Sawtooth-like waves in place of P waves

• Wide QRS complexes with consistent intervals

• Heart rate between 60-100 beats per minute

• Irregularly irregular rhythm with no discernible P waves