Cardiac Function and ECG lab exam Questions and Answers Verified Solutions Latest Update (2026/2027)

Cardiac Function and ECG lab exam
Questions and Answers Verified
Solutions Latest Update (2026/2027)



Question:

Cardiovascular System

Answer:

System consisting of the heart and blood vessels that
circulates blood throughout the body.




Question:

Electrocardiogram (ECG/EKG)

Answer:




Question:

Records changes in electrical potential (mV) over
time (seconds) caused by summed depolarization/repolarization of cardiac
cells
Heart Rate (HR)

Answer:

Number of heartbeats per minute (normal: 55-85 bpm at rest).

,Question:

Tachycardia

Answer:




Question:

Heart rate over 100 bpm
Bradycardia

Answer:




Question:

Heart rate under 60 bpm
Myogenic

Answer:

The heart generates its own electrical impulses without nervous
system input




Question:

Autorhythmic Cells

Answer:

Specialized cardiac cells that spontaneously depolarize to
initiate heartbeats




Question:

, Sinoatrial (SA) Node

Answer:

Pacemaker of the heart; initiates depolarization (located in
right atrium).




Question:

Atrioventricular (AV) Node

Answer:




Question:

Slows and relays impulse from atria to ventricles
Bundle of His (AV Bundle)

Answer:

Conducts impulses from AV node into interventricular
septum




Question:

Bundle Branches

Answer:




Question:

Right and left pathways conducting impulses to ventricles
Purkinje Fibers