Cardiovascular System Part 3 W5 Flashcards

1
Q

What is a cardiac arrest?

A

Sudden unexpected loss of contractile function of the heart

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2
Q

What does an AED do?

A

Applies an electrical shock to body to reverse abnormal arrhythmia to restore ability of the heart to pump blood

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2
Q

What is CPR?

A

Basic life support to help the heart circulate some blood to the tissues

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3
Q

How is blood flow delivered to exercise skeletal muscle increased?
(2 mechanisms)

A

1) Increased cardiac output
2) A redistribution of blood flow from inactive organs to the working skeletal muscl

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4
Q

What is cardiac output increase during exercise directly proportional too?

A

The metabolic rate required to perform the exercise

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5
Q

What is cardiac output?

A

The amount of blood pumped by the heart each minute

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6
Q

What is cardiac output the product of?

A

Heart Rate x Stroke Volume

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7
Q

What is heart rate?

A

Number of beats per minute

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8
Q

What is stroke volume?

A

Amount of blood ejected in each beat

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9
Q

What is end-diastolic volume?

A

Volume of blood in the ventricles at the end of diastole
Preload

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10
Q

What is frank-starling mechanisms?

A

Stretch of ventricles

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11
Q

What is average aortic blood pressure?

A

Pressure the heart must pump against to eject blood
Afterload

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12
Q

What is the strength of ventricular contraction (contractility) enhanced by?

A

Circulating epinephrine and norepinephrine
Direct sympathetic stimulation of heart

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13
Q

What is double product?

A

Rate-pressure product

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14
Q

How do you calculate double product?

A

Heart rate x systolic blood pressure

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