Chapter 19

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13 Terms

1
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The cardiac conduction system includes all except

Tendinous cords

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When blood passes through the mitral valve, it moves

Left atrium → left ventricle

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Given end

diastolic volume (EDV; End

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Stroke volume (SV; Stroke Volume)

30 milliliters (mL)

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Ejection fraction (EF; Ejection Fraction)

33%

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Heart rate (HR; Heart Rate)

85 beats per minute (bpm; beats per minute)

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A heart rate of 45 beats per minute (bpm; beats per minute) and absence of P waves suggest

Damage to the sinuatrial node (SA node; Sinuatrial Node)

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Number of pulmonary veins emptying into the right atrium

None

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All of the following are positive chronotropic agents except

Acetylcholine

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The atria contract during

P

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Cardiac muscle does not exhibit tetanus because it has

Long absolute refractory period

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Blood in ventricle during isovolumetric relaxation is

End

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Drugs that increase myocardial contractility have a

Positive inotropic effect