The fifth week of BIO-202: Human Anatomy and Physiology II.
A cardiac cycle is defined as one complete heartbeat.
contraction of chambers systole (pressure going up)
Relaxation of chamber diastole (pressure going down)
All of the chambers are peaceful and tranquil.
An overview of the stages of the cardiac cycle
1. Ventricular Filtration is the first step in the process of removing waste from the heart (quiescent period)
a. systole of the atrium, b. passive filling of the atrium
2. Ventricular Contraction Isovolumetric
3. Ventricular Fluid Ejection
4. Ventricular Relaxation (Isovolumetric)
1. Ventricular Filtration is the first step in the process of removing waste from the heart.
Rapid filling is characterized by quick filling, diastasis, and atrial systole.
At the end of diastole, the end-diastolic volume (EDV) of blood in each ventricle (Max Full)
The amount of blood pumped out by the heart with each contraction is called stroke volume (SV). (EDV-ESV)
The amount of blood left in the ventricle after a contraction is known as end-systolic volume (SV).
Ejection fraction = SV/EDV This will provide us with a percentage of the blood we sent out.