Cardiology Basics

Front

Electrocardiogram

Back

Record of the electrical activity of the heart

Front

Tachycardia

Back

Heart rate greater than 100 beats per minute in an adult

Front

Normal Sinus Rhythm

Back

Electrical activity appears normal and the signal arises within the SA node

Front

Ventricular Fibrillation

Back

Life-threatening dysrhythmia that causes the ventricular myocardium to quiver in an uncoordinated and ineffective way

Front

Sinoatrial Node

Back

Place where the electrical signal normally arises; pacemaker of the heart

Front

Bradycardia

Back

Heart rate below 60 beats per minute

Front

Ectopic Focus

Back

Area outside of the SA node that gives rise to an electrical signal

Front

QRS Complex

Back

indicates ventricular depolarization

atrial repolarization

ranges 0.04-0.10

abnormalities=ventricular dysfunction

Front

Right Atrium

Back

Location of the SA node

Front

Bundle of His

Back

The electrical signal spreads from the AV node to this structure