Cardiac cycle
Cardiac cycle
Changes that occur in the heart during one beat, are
repeated in the same order in the next beat. This
cyclical repetition of the various changes in heart, from
beat to beat, is called Cardiac Cycle.
Cardiac Cycle time :- A single Cardiac cycle 0.8 sec.
Isovolumetric Contraction :- (0.05 sec) It occurs when
the AV valves are forced shut. During this brief period,
while the Semilunar valves are still closed, the volume of
the ventricles remain unchanged with gradually increase
of ventricular contraction.
Rapid ventricular ejection :- (0.11 sec) It occurs as the
continuing contraction of the ventricles increases the
pressure in the ventricles and forces the semilunar
valves open. At this point, blood is forced out of the
ventricles.
Cardiac cycle
Changes that occur in the heart during one beat, are
repeated in the same order in the next beat. This
cyclical repetition of the various changes in heart, from
beat to beat, is called Cardiac Cycle.
Cardiac Cycle time :- A single Cardiac cycle 0.8 sec.
Isovolumetric Contraction :- (0.05 sec) It occurs when
the AV valves are forced shut. During this brief period,
while the Semilunar valves are still closed, the volume of
the ventricles remain unchanged with gradually increase
of ventricular contraction.
Rapid ventricular ejection :- (0.11 sec) It occurs as the
continuing contraction of the ventricles increases the
pressure in the ventricles and forces the semilunar
valves open. At this point, blood is forced out of the
ventricles.
