EKG MIDTERM

What is also known as the pacemaker of the heart?

• AV Node
• SA Node
• Bundle of His
• Purkinje Fibers

The valve between the right atrium and right ventricle is known as the ___ valve.

• bicuspid/mitral
• tricuspid
• pulmonary
• aortic

Travel the electrical conduction of the heart starting with the SA node.

• AV node, Purkinje fibers, bundle of His, left and right bundle branches
• Bundle of His, left and right bundle branches, AV node
• AV node, Bundle of His, Purkinje fibers, left and right bundle branches
• AV node, Bundle of His, left and right bundle branches, Purkinje fibers

Which 2 chambers pump oxygenated blood?

• right atrium, left ventricle
• right atrium, right ventricle
• left atrium, right ventricle
• left atrium, left ventricle

An atrial pacemaker site that changes from location to location has

• P waves that continually change in appearance

• One pacemaker site from which the impulse arise

• Inverted P’ waves

• A chaotic baseline preceding each QRS complex

Which of the following has more P waves than QRS complexes?

• A dysrhythmia where the pacemaker changes from site to site with each beat

• Early beats that arise from the atria

• AV heart block

• Dysrhythmias that arise from the AV junction

The ___________ represents the end of ventricular depolarization and beginning of ventricular repolarization.

• T wave

• U wave

• QT interval

• ST segment

ST segment elevation suggests:

• Myocardial ischemia

• Myocardial injury/infarction

• Right and left ventricular hypertrophy

• A healthy heart

The ___________ represents ventricular repolarization.

• T wave

• U wave

• QT interval

• ST segment

1. Prominent U waves are seen in:

• Hypokalemia

• myocardial infarction.

• digitalis toxicity.

• All of these