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RTH 236 > cardiac cycle > Flashcards

cardiac cycle Flashcards

1
Q

What is another name for atrial contraction?

A

diastolic late phase filling (aka kick)

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2
Q

what is the electrical event for atrial contraction?

A

firing of the SA node (p wave)

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3
Q

what is the mechanical event for atrial contraction?

A

contraction of the atria

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4
Q

what is the anatomically event for atrial contraction?

A

A-V valves open and semi-lunar (pulmonic and aortic) valves are closed

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5
Q

what does iso mean

A

no movement

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6
Q

What is the electrical event for systolic isovolumetric contraction

A

peak of R wave

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7
Q

what is the mechanical event for systolic isovolumetric contraction

A

ventricles contract and the atria are relaxed

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8
Q

What is the anatomically event for systolic isovolumetric contraction

A

all valves are closed

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9
Q

what is the amount of blood in left vent at end of diastole called?

A

EDV (end diastolic volume)

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10
Q

what is the electrical event for the systolic rapid ejection

A

none

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11
Q

what is the mechanical event for systolic rapid ejection

A

ventricular pressure exceeds atrial pressure. Rapid ejection of blood into arteries occurs

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12
Q

what is the anatomically event for systolic rapid ejection

A

semi-lunar valves open

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13
Q

what is the electrical event for reduced ejection phase

A

T wave on the ECG

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14
Q

what is the mechanical event for reduced ejection phase

A

Ventricle volume decreases and the vent pressure plateaus and decreases

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15
Q

what is the anatomically event reduced ejection phase

A

atrial pressure continues to rise during ejection period because of continued flow of blood into the atria.

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16
Q

what is the electrical event for diastolic isovolumetric relaxation

A

as blood impacts the semi-lunar valves they snap shut.

17
Q

what is the mechanical event for diastolic isovolumetric relaxation

A

ventricles relax

18
Q

what is the anatomically event diastolic isovolumetric relaxation

A

all valves are closed

19
Q

Abrupt shift in aortic pressure and produces the…

A

dicrotic notch (this is where relaxation begins)

20
Q

what is the electrical event for diasotlic ventricular filling

A

none

21
Q

what is the mechanical event for diasotlic ventricular filling

A

atria have continued to fill and atria pressure exceed vent pressure

22
Q

what is the anatomically event diasotlic ventricular filling

A

A-V valves open and semi-lunar valves close

23
Q

how much accounts for the filling

A

60-80%

24
Q

what is the equation to find stoke volume (SV)

A

EDV - ESV = SV

25
Q

what is the equation for finding ejection fraction

A

EF = SV/EDV x 100

RTH 236 (2 decks)

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