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Bio-Medical > The Heart > Flashcards

The Heart Flashcards

1
Q

What is an ECG or EKG

A

electrocardiogram

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2
Q

what is a recording of electrical changes that occur in the myocardium during cardiac cycle?

A

ECG or EKG

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3
Q

What is an ECG or EKG used to assess?

A

It is used to assess the heart’s ability to conduct impulses

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4
Q

The defections in the normal ECG, or waves, include?

A

P wave, QRS, and T wave

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5
Q

P wave

A

Atrial depolarization (falling to ventricle)

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6
Q

QRS

A

Complex (three ways)- ventricular depolarization (heart is contracting)

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7
Q

T wave

A

Ventricular repolarization (refilling)

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8
Q

Clumps or strands of specialized cardiac muscle tissue which initiate and distribute impulses throughout the myocardium

A

Cardiac conduction system

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9
Q

What does the cardiac conduction system coordinate?

A

The events of the cardiac cycle.

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10
Q

Where does the Cardiac Conduction system start?

A

Starts at SA node across atrium to AV node

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11
Q

What valves do the lubb take care of?

A

The bicuspid valve and the tricuspid valve

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12
Q

What valves do the dupp take care of?

A

The semilunar valve

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13
Q

What nodes control the heart?

A

SA nodes

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14
Q

What are the fibers that control the heart rate?

A

Smypathetic and parasympathetic fibers

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15
Q

What influences the heart rate?

A

The regulatory reflex centers

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16
Q

What are additional factors that may influence heart rate :

A

Physical exercise
Body temperature
Concentration of various ions including Potassium and Calcium

17
Q

What impulses decrease heart action?

A

Parasympathetic

18
Q

What impulses increase heart action?

A

Sympathetic

19
Q

What does the cardiac center regulates?

A

Autonomic impulses to the heart

20
Q

What are two such areas exist in the heart:

A

In the atrial walls called the atrial syncytium

In the ventricular walls called the ventricular syncytium

21
Q

What are the atrial walls called?

A

The atrial syncytium

22
Q

What are the ventricular walls called?

A

The ventricular syncytium

23
Q

Sinoatrail node goes across to the what?

A

The atrium

Bio-Medical (3 decks)

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