What is the heart cycle :-
According medical specialist
Colorado Heart Cycle, a nonprofit bicycle club offering supported national and
international bike tours, the cardiac
cycle is the sequence of events that occurs when the heart beats. Read More :- Heart Powerpoint Templates
There are numerous
benefits to cycling, the principal one being a health issue, reducing the risk
of heart disease. A study of over 10,000 people found that those who cycle 20
miles or more a week, are less likely to have Heart problems. The risk of Heart
attack is reduced by 50%. Doctors say that to benefit from exercise, you should
maintain your heart rate at an elevated level for at least 20 minutes, this can
be achieved by cycling.
Cardiac Cycle: 1st
Diastole Phase
During the diastole phase, the atria and ventricles are
relaxed and the atrioventricular valves are open. De-oxygenated blood from the
superior and inferior vena cava flows into the right atrium. The open
atrioventricular valves allow blood to pass through to the ventricles. The SA
node contracts triggering the atria to contract. The right atrium empties its
contents into the right ventricle. The tricuspid valve prevents the blood from
flowing back into the right atrium. Cardiology Powerpoint Templates
Cardiac Cycle: 2nd
Diastole Phase
In the next diastole period, the semilunar valves close and
the atrioventricular valves open. Blood from the pulmonary veins fills the left
atrium. (Blood from the vena cava is also filling the right atrium.) The SA
node contracts again triggering the atria to contract. The left atrium empties
its contents into the left ventricle. The mitral valve prevents the oxygenated
blood from flowing back into the left atrium.
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