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The Cardiac Cycle
Medical Physiology, SOM 2014 fall part 1
20
Medical
Professional
10/03/2010

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Cards

Term
phases of Ventricular systole
Definition
1. Isovolumetric contraction
2. Rapid Ejection
3. Reduced Ejection
Term
phases of Ventricular diastole
Definition
1. Isovolumetric relaxation
2. Rapid filling
3. Reduced filling
(4. atrial systole)
Term
Isovolumetric contraction
Definition
begins when mitral valve closes (S1), R wave
Ends when aortic valve opens
Term
Reduced ejection corresponds with which part of ECG?
Definition
T wave
Term
Isovolumetric relaxation
Definition
begins: Aortic valve closes (S2), end of t wave
Ends: Mitral valve opens (S3)

Elastic recoil of aorta causes some flow to circulatory system even though the aortic valve has closed
Term
Rapid ventricular filling
Definition
begins when mitral valve opens (S3)
Term
beginning of atrial systole corresponds with what wave of ECG?
End of atrial systole?
Definition
beginning: P wave
End: Q wave
Term
S1 sound
Definition
mitral valve closing (EDV)
Beginning of systole
Term
S2 sound
Definition
aortic valve closing
Beginning of diastole
Term
S3 sound
Definition
Mitral valve opening (ESV)
Term
S4 sound
Definition
atrial systole
Term
R wave
Definition
Isovolumetric contraction
Term
T wave
Definition
reduced ejection
Term
P wave
Definition
Atrial systole
Term
calculate Stroke Volume
Definition
SV = EDV - ESV
Term
calculate Ejection Fraction
Definition
EF = SV/EDV
Term
calculate heart rate
Definition
HR = CO/SV
Term
calculate flow using Fick's principle
Definition
Q = VO2/(Ca-Cv)
Term
on pressure loop curve, when is ESV?
Definition
when mitral valve opens
Term
on pressure loop curve; when is EDV?
Definition
When mitral valve closes
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