Pt.2 Interpretation

P-P Interval

• What does it measure

Time between atrial depolarization

QRS Complex

• What is it?

Ventricular Depolarization

R-R Interval

• What does this measure

Time between Ventricular Depolarization

PR Interval

• What is it?

Electrical Activity from the SA node to the AV node into the ventricles

T Wave

• What is it

Repolarization of the ventricles

P wave

• What is it

Atrial Depolarization

What happens if there is impaired conduction through the AV Node?

Prolonged PR Interval

What method can you use to measure both regular and irregular heart rates?

P-P method

• measure the distance between the P waves

Signs of Ischemia

T wave inversion

ST Segment changes

→ Alert provider immediately

What are characteristics of Atrial Fibrillation?

R-R intervals are IRREGULARLY IRREGULAR

How should you measure if the Ventricular Depolarizes REGULARLY?

Measuring the R-R Wave intervals

What finding on an EKG differentiates Idioventricular rhythm from Junctional Rhythm?

Accelerated Idioventricular has WIDE QRS

What is the difference between ST segment Elevation and Depression

Elevation: the injury is CURRENT, but the tissue is not dead

Depression: myocardial ischemia that is less severe than Elevation

• Potassium depletion, Digoxin effects

An ECG tracing that can indicate a Previous MI

pathological Q waves

What should you expect to see during Ventricular Hypertrophy?

Increased Amplitude of QRS

Atrial Fibrillation

Premature Atrial Complexes

Premature Ventricular Complexes

Ventricular Tachycardia

Agonal Rhythm

Atrial Flutter

Atrial Pacing

Bundle Branch Block

Accelerated Junctional Rhythm

First Degree Atrioventricular Block

Idioventricular Rhythm

Junctional Escape Rhythm

Premature Junctional Complex

Second Degree Atrioventricular Block- Type 1

Second Degree Atrioventricular Block- Type 2

Sinus Arrest

Sinus Dysrhythmias

Sinus Tachycardia

ST Segment Depression

ST Segment Elevation

Supraventricular Tachycardia (SVT)

Third Degree Atrioventricular Block (Complete Heart Block)

Ventricular Fibrillation

Ventricular Pacing