The EKG

Diagrams from Dubin, Dale. 1970. Rapid Interpretation of EKG'x Third Ed. Cover Publ Co. Tampa, FL

What Can You Do With EKG

• Rate

• Rhythm

• Axis

• Hypertrophy

• Infarct

EKG Leads

Standard Leads (Limb leads)

Chest Leads

Chest Leads

V1 and V2 Chest Leads

The View from Different Leads

EKGs of Same Beat From Different Chest Leads

Locations of Potential Pacemakers

Endogenous Rates

Sinus Rhythm

Sinus Arrhythmia

Wandering Pacemaker

Premature Atrial Beat

SA Block

Sinus Arrest

Locations of Potential Pacemakers

Atrial Escape from SA Block

AV Escape to SA Block

Ventricular Escape

AV Blocks

Primary heart block -- lengthened P-R interval

20 AV Blocks

Some atrial beats not followed by ventricular contractions

20 Block -- Wenckeback

Lengthening P-R interval

30 AV Block

Wolff-Parkinson-White Syndrome

Accessory Pathway - usually near the AV node

Virtually no delay between P and QRS

AV Node Premature Beat

Premature Ventricular Contraction

Multiple PVCs

Paroxysmal Tachycardia

Atrial Flutter

Atrial Fibrillation

Ventricular Flutter

Ventricular Fibrillation

Anything Obviously Wrong?

Atrial Fibrillation