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Biology B4 > B4.4 > Flashcards

B4.4 Flashcards

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1
Q

Q: What happens when heart valves are leaky?

A

Valves don’t close properly
Causes blood to flow backwards

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2
Q

Q: What are the two main types of heart valves used in surgeries?

A

Mechanical valves
Biological valves

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3
Q

Q: What is a characteristic of mechanical valves?

A

Last a very long time

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4
Q

Q: What is a drawback of mechanical valves?

A

Patients have to take medicine for the rest of their life

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5
Q

Q: What is a characteristic of biological valves?

A

Don’t need any medication

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6
Q

Q: What is a drawback of biological valves?

A

Only last 12-15 years

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7
Q

Q: What are artificial pacemakers used for?

A

To correct irregularities in the heart rhythm

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8
Q

Q: How do artificial pacemakers help the heart?

A

Send electrical signals to the heart
Stimulate it to beat properly

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9
Q

Q: What is necessary for patients with artificial pacemakers?

A

Need regular check-ups

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10
Q

Q: When are artificial hearts used?

A

To keep patients alive while they wait for a transplant
To allow the heart to rest as an aid to recovery

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11
Q

Q: What is an advantage of artificial hearts over donor hearts?

A

Less likely to be rejected

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12
Q

Q: What are some surgical risks associated with artificial hearts?

A

Risk of bleeding
Risk of infection

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13
Q

Q: Do artificial hearts work as well as natural healthy hearts?

A

No, they don’t work as well

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14
Q

Q: What is a potential complication of artificial hearts?

A

Risk of blood clots

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15
Q

Q: What must patients with artificial hearts do to mitigate certain risks?

A

Take drugs to thin the blood

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16
Q

Q: What is the function of heart valves?

A

To ensure blood flows in one direction

17
Q

Q: Why might someone need a heart valve replacement?

A

Due to valve dysfunction like leaking

18
Q

Q: What is the primary benefit of using biological valves despite their shorter lifespan?

A

No need for lifelong medication

19
Q

Q: What regular maintenance is required for artificial pacemakers?

A

Regular check-ups

20
Q

Q: What is the main benefit of mechanical valves despite the need for medication?

A

They last a very long time

Biology B4 (6 decks)

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