Basics of cardiac cycle. Quick review and a brief idea about the sequences. Diagrams to aid understanding and memorizing.

1. Preksha singh

2. CARDIAC CYCLE

3. DEFINITIONenda
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The sequence of changes in pressure and flow in heart chambers
and blood vessels in between two subsequent cardiac contractions.

4. WHAT YOU NEED TO KNOW?
Amount of blood pumped out of each
ventricle per minute(the heart ).
CARDIAC OUTPUT
CARDIAC OUTPUT=STROKE VOLUME X
HEART RATE
01
STROKE VOLUME Volume of blood ejected by
ventricle per beat.
03
HEART RATE Number of beats per unit time03

5. SEQUENCE OF
CYCLE:
ATRIAL SYSTOLE
VENTRICULAR SYSTOLE.
VENTRICULAR DIASTOLE .
ATRIAL DIASTOLE

10. MCQ
M
Q
1. If due to some injury the cordae tendinae of tricuspid
valve of human heart is partially non functional, what will
be the immediate effect?
a) The flow of blood into the aorta will be slowed down.
b) The pacemaker will stop working.
c) The blood will tend to flow back into the left atrium
d) The flow of blood into the pulmonary artery will be
reduced.
2. “X” is the rhythmic contraction and relaxation in the aorta
and its main arteries. What is X?
a) Heart beat
b) Heart rate
c) Pulse
d) cardiac output
3. In a cardiac output if 5250 ml/min with 75 heart
beats/min, stroke volume is ?
a) 60ml
b) 80ml
c) 55ml
d) 70ml