Ventricular Systole refers to the phase of the cardiac cycle where the left and right ventricles contract at the same time and pump blood into the aorta and pulmonary trunk, respectively

1. Ventricular
Systole

2. Ventricular Systole refers to the phase of the cardiac cycle
where the left and right ventricles contract at the same time
and pump blood into the aorta and pulmonary trunk,
respectively.
INTRODUCTION

3. Ventricular
Events
Atrial diastole & Ventricular Systole
begin at the same time.
The ventricular systole involves two
major stages of activity. They are-
1. Isovolumic Contraction
2. Ventricular Ejection

4. Isovolumic Contraction
Isovloumic contraction is the 1st phase of ventricular systole.
 1.During this phase Ventricles are filled with blood.
 2. Initially, as the muscles in the ventricle contract, the pressure of
the blood within the chamber rises.
 3.When Ventricular pressure is greater than Atrial pressure,
Atrioventricular (AV) valve closed but dose not create enough
pressure to open semilunar valves.
 4. Since blood is not being ejected from the ventricles at this early
stage, the volume of blood within the chamber remains constant.
Consequently, this initial phase of ventricular systole is known as
isovolumic contraction.

5. The second phase of ventricular systole is
Ventricular ejection.
 Due to continues contraction of the
ventricular muscle, pressure increased
inside the ventricle.
 Ventricular contraction forces to open the
semi lunar valves so that blood is ejected
into pulmonary artery and aorta.
Ventricular Ejection

6. Flow Chart
Ventricles are filled
with blood
Ventricles begin
contraction
Pressure closes AV
valves
Increased pressure
in ventricles due to
continues
contraction
Semi-lunar valves
open
Blood ejected into
the aorta and
pulmonary artery

8. Thank You