APP Lecture 3: Cardiac Muscle and Rhythmic Excitation of the Heart
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13 Terms
Endothelial cells
Line the blood vessels and inside of the heart
Anti-stick surfaces
Layers of the heart from inside outward
Endocardium
Myocardium
Epicardium
Pericardium
How are cardiac muscle fibers structured?
Syncytial, interconnected
Have intercalated discs
How many heartbeats before the heart stops?
8
What is the action potential of cardiac muscle?
300-400 ms
What does Bachmann’s bundle do?
Moves impulses from left to right atrium
P wave
Atrial depolarization
What represents the delay across the AV node on an electrocardiogram?
P-R interval
Q-R interval
Atrial repolarization
QRS complex
Ventricular depolarization
S-T interval
Calcium plateau
T wave
Ventricular repolarization
Q-T interval
Time of the heart’s contraction
Note 
Flashcards (46)