Cardiovascular | Cardiac Cycle
Ninja Nerd・2 minutes read
The cardiac cycle involves the flow of blood through the heart's chambers based on pressure differentials and valve openings and closings, crucial for proper functioning. Ventricular contractions and pressure changes lead to the opening and closing of valves, allowing blood to move in and out of the heart efficiently.
Insights
- The cardiac cycle involves a complex series of events where blood flows through the heart's chambers, regulated by differences in pressure and valve mechanisms.
- The opening and closing of AV and semilunar valves are crucial determinants of blood flow direction within the heart, with pressure differentials playing a key role in orchestrating these movements.
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Recent questions
What is the average duration of the cardiac cycle?
0.8 seconds
What causes the first heart sound "Lub"?
AV valves closing
What initiates atrial depolarization in the heart?
SA node firing
What determines the opening and closing of heart valves?
Pressure differences in ventricles and arteries
What phase of the cardiac cycle focuses on blood ejection from the ventricles?
Mid to late ventricular systole
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