Cardic Cycle Key Words

Question 1

Cardiac Cycle

Answer 1

The period of time between the onset of atrial contraction (atrial systole) andventricular relaxation (ventricular diastole

Question 2

Diastole

Answer 2

period of time when the heart muscle is relaxed and the chambers fill with blo

Question 3

end diastolic volume (EDV): (also, preload)

Answer 3

the amount of blood in the ventricles at the end of atrial systole just prior to ventricular contraction

Question 4

end systolic volume (ESV)

Answer 4

amount of blood remaining in each ventricle following systole

Question 5

heart sounds

Answer 5

sounds heard via auscultation with a stethoscope of the closing of theatrioventricular valves (“lub”) and semilunar valves (“dub”)

Question 6

Isovolumic contraction: also, isovolumetric contraction

Answer 6

initial phase of ventricularcontraction in which tension and pressure in the ventricle increase, but no blood is pumpedor ejected from the heart

Question 7

isovolumic ventricular relaxation phase

Answer 7

initial phase of the ventricular diastole whenpressure in the ventricles drops below pressure in the two major arteries, the pulmonarytrunk, and the aorta, and blood attempts to flow back into the ventricles, producing thedicrotic notch of the ECG and closing the two semilunar valves

Question 8

Preload: (also, end diastolic volume)

Answer 8

amount of blood in the ventricles at the end of atrialsystole just prior to ventricular contraction

Question 9

systole

Answer 9

period of time when the heart muscle is contracting

Question 10

ventricular ejection phase

Answer 10

second phase of ventricular systole during which blood ispumped from the ventricle