Atrial Rhythm

Question 1

General Atrial Rhythms

Answer 1

Any atrial area may originate an impulse
Rhythms have upright P waves preceding each QRS complex

Question 2

Premature Atrial Syndrome

Answer 2

Regular but interrupted
Rate: Varies
P Wave: P, U
PRI: 0.12-0.2
QRS: ≤0.12
ST: Isolectrical
T: P, U
An early p wave

Question 3

Nonconducted Premature Atrial Complex

Answer 3

Regular but interrupted
Rate: Varies
P Wave: P, U
PRI: 0.12-0.2
QRS: ≤0.12
ST: Isolectrical
T: P, U
An early p wave not followed by a QRS complex

Question 4

Supraventricular Tachycardia

Answer 4

Regular
Rate: ≥151
P Wave: P, U
PRI: Can’t be measured since p wave is hidden
QRS: ≤0.12
ST: Isolectrical
T: P, U

Question 5

Atrial Fibrillation

Answer 5

Irregular
Rate: Atrial 350-700, Ventricular 60-100
P Wave: No discernable p wave
PRI: None
QRS: ≤0.12
ST: Isolectrical
T: P, U
Wavy baseline btwn QRS

Question 6

Atrial Fibrillation Rapid Ventricular Response

Answer 6

Irregular
Rate: >100
P Wave: No discernable p wave
PRI: None
QRS: ≤0.12
ST: Isolectrical
T: P, U
Wavy baseline btwn QRS,
Treat when V rate is over 140

Question 7

Atrial Flutter

Answer 7

Regular
Rate: Atrial 250-350, Ventricular varies
P Wave: Saw tooth pattern
PRI: None
QRS: ≤0.12
ST: Isolectrical
T: P, U
If stable leave pt alone, if unstable treat with electrical therapy

Question 8

Wandering Atrial Pacemaker

Answer 8

Irregular
Rate: <100
P Wave: 3 Different p waves
PRI: 0.12-0.2
QRS: ≤0.12
ST: Isolectrical
T: P, U

Question 9

Multifocal Atrial Tachycardia

Answer 9

Irregular
Rate: >100
P Wave: 3 different p waves
PRI: 0.12-0.2
QRS: ≤0.12
ST: Isolectrical
T: P, U