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Questions and Answers
What is the formula for Cardiac Output (CO)?
What is the formula for Cardiac Output (CO)?
- CO = ESV - EDV
- CO = SV / HR
- CO = EDV - ESV
- CO = SV x HR (correct)
Which term refers to the final volume in the ventricle at the end of diastole?
Which term refers to the final volume in the ventricle at the end of diastole?
- End Diastolic Volume (EDV) (correct)
- End Systolic Volume (ESV)
- Cardiac Output (CO)
- Stroke Volume (SV)
What is the normal range for Stroke Volume (SV)?
What is the normal range for Stroke Volume (SV)?
- 100-150 ml/beat
- 30-60 ml/beat
- 150-200 ml/beat
- 60-100 ml/beat (correct)
What is the term for the force of mechanical contraction in the heart?
What is the term for the force of mechanical contraction in the heart?
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What effect does an increase in preload have on the heart?
What effect does an increase in preload have on the heart?
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Study Notes
Cardiac Output (CO)
- Formula for Cardiac Output (CO): CO = Heart Rate (HR) × Stroke Volume (SV)
Ventricular Volume
- End Diastolic Volume (EDV): the final volume in the ventricle at the end of diastole
Stroke Volume (SV)
- Normal range for Stroke Volume (SV): 60-100 mL
Cardiac Contraction
- Inotropy: the force of mechanical contraction in the heart
Preload Effect
- Increase in preload: increases stretch of cardiac muscle, leading to increased contraction force and stroke volume
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