Sinus Rhythms Basics

Normal PR Interval

Normal QRS Interval

P wave is upright and uniform.

There is one p wave before each QRS complex.

Rhythm is regular.

Rate is 72.

• sinus rhythm

• sinus tachycardia

• sinus bradycardia

• sinus arrhythmia

Normal PR Interval

Normal QRS Interval

P wave is upright and uniform.

There is one p wave before each QRS complex.

Rhythm is regular.

Rate is 122.

• sinus rhythm

• sinus tachycardia

• sinus bradycardia

• sinus arrhythmia

Normal PR Interval

Normal QRS Interval

P wave is upright and uniform.

There is one p wave before each QRS complex.

Rhythm is irregular.

Rate is 65.

• sinus rhythm

• sinus tachycardia

• sinus bradycardia

• sinus arrhythmia

Normal PR Interval

Normal QRS Interval

P wave is upright and uniform.

There is one p wave before each QRS complex.

Rhythm is regular.

Rate is 48.

• sinus rhythm

• sinus tachycardia

• sinus bradycardia

• sinus arrythmia

What is the hear rate of this ECG rhytm?

• 40

• 70

• 100

• 130

This ECG would be interpreted as

• sinus rhythm

• sinus tachycardia

• sinus bradycardia

• sinus arrhythmia

This rhythm would be interpreted as

• sinus rhythm

• sinus tachycardia

• sinus bradycardia

• sinus arrhythmia

This rhythm would be interpreted as

• sinus rhythm

• sinus tachycardia

• sinus bradycardia

• sinus arrhythmia

I am a rhythm with a rate of 104. I am irregular and my p waves are missing. Who am I?

• sinus rhythm

• sinus tachycardia

• sinus bradycardia

• sinus arrhythmia

• none of the above

I am a rhythm with a rate of 94. I am irregular. My PR interval is normal. There is a QRS after each P wave. Who am I?

• sinus rhythm

• sinus tachycardia

• sinus bradycardia

• sinus arrhythmia

• none of the above