Introduction to Electrocardiography

The _______ is a widely used medical diagnostic tool that records biopotential differences arising from electrical activity of the heart muscle.

• electromyogram (EMG)

• electroencephalogram (EEG)

• electrocardiogram (ECG)

• Electroretinogram (ERG)

The _______ is located at the superior wall of the right atrium and initiates the contraction of the heart.

• sinoatrial node (SA)

• atrioventricular (AV) node

• atrioventricular bundle

• purkinje fibres

What does phase 0 represents?

• resting membrane potential

• depolarization

• plateu

• rapid repolarization

The _______ is located in the lower portion of the right atrium.

• sinoatrial node (SA)

• atrioventricular (AV) node

• atrioventricular bundle

• purkinje fibres

After action potentials pass through the atrioventricular (AV) node, they are rapidly trasmitted through the _______.

• sinoatrial node (SA)

• atrioventricular (AV) node

• atrioventricular bundle

• purkinje fibres

The _______ pass to the apex of the heart and then extend to the cardiac muscle of the ventricle walls.

• sinoatrial node (SA)

• atrioventricular (AV) node

• atrioventricular bundle

• purkinje fibres

The _______ is associated to the impulse has traversed the atria and the AV node.

• P wave

• Q

• QRS complex

• T wave

The _______ is associated with the original impulse from the SA node and its subsequent spread through atria.

• P wave

• Q

• QRS complex

• T wave

The _______ is the depolarization of the ventricular muscle.

• P wave

• Q

• QRS complex

• T wave

The _______ represents repolarization of the ventricles.

• P wave

• Q

• QRS complex

• T wave