Stages of The Cardiac Cycle
| AV valves* | Semilunar valves† | Status of ventricles and atria | |
|---|---|---|---|
| 1. early diastole |
|
|
• whole heart is relaxed
• ventricles are expanding and filling |
| 2. atrial systole |
|
|
• atria contract and pump blood
• additional 10–40% filling of ventricles |
| 3. isovolumic ventricular contraction |
|
|
• ventricular myocytes begin to contract
• ventricle volume unchanged |
| 4. ventricular ejection |
|
|
• ventricles fully contract
• pump blood to rest of body |
| 5. Isovolumic ventricular relaxation |
|
|
• ventricles relax
• ventricle volume unchanged |
|
|
|||
Read more about this topic: Cardiac Cycle
Famous quotes containing the words stages of, stages and/or cycle:
“The playing adult steps sideward into another reality; the playing child advances forward to new stages of mastery....Child’s play is the infantile form of the human ability to deal with experience by creating model situations and to master reality by experiment and planning.”
—Erik H. Erikson (20th century)
“The playing adult steps sideward into another reality; the playing child advances forward to new stages of mastery....Child’s play is the infantile form of the human ability to deal with experience by creating model situations and to master reality by experiment and planning.”
—Erik H. Erikson (20th century)
“The lifelong process of caregiving, is the ultimate link between caregivers of all ages. You and I are not just in a phase we will outgrow. This is life—birth, death, and everything in between.... The care continuum is the cycle of life turning full circle in each of our lives. And what we learn when we spoon-feed our babies will echo in our ears as we feed our parents. The point is not to be done. The point is to be ready to do again.”
—Paula C. Lowe (20th century)