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Flashcards in The Heart Deck (10):
1

What vessel supplies oxygenated blood to the heart muscle?

Coronary arteries on the surface

2

Heart muscle

Is… which means it …

Cardiac muscle

Myogenic
Initiates own contractions

3

What prevents valves from turning inside out?

Tendinous cords attached to valves

4

Fibrillation

Uncoordinated contraction of atria or ventricles

5

SAN (sino-atrial node)

Heart's pacemaker
Generates electrical activity
Initiates wave of excitation over walls and causes cardiac muscle to contract (atrial systole)

6

AVN (atrio-ventricular node)

Which is…

Conducts wave of excitation through ventricles

Delayed to allow time for atria to finish contracting

7

Fast heart rate

Tachycardia

8

Slow heart rate

Bradycardia

9

Atria more frequently beats than ventricles

Atrial fibrillation

10

3rd beat is an early ventricular

Ectopic heartbeat