the cardiac conduction_system

The Cardiac Conduction System

By: Regina L. Holbrook

First we have to understand that while facing a patient that THEIR left side is YOUR right side. Patients’ left arm

Doctors’ right arm

There are 4 chambers that blood flows through in your heart

The Right Atrium The Right Ventricle The Left Atrium The Left Ventricle

There are 2 valves that exist between each Atrium and Ventricle that close after the blood is pumped through them

The Right Pulmonary Atrioventricular Valve (Tricuspid Valve)

The Left Pulmonary Atrioventricular Valve (Bicuspid Valve)

These valves help to keep your blood from flowing back the way from which it came, by closing up with each beat. There are also tiny valves in all the veins and arteries that serve the same purpose, called venous valves.

There are 3 veins that carry Deoxygenated Blood into the heart.

Superior Vena Cava Inferior Vena Cava Coronary Sinus

Our Journey Begins!

Blood flows into the Right Atrium

Down through the Tricuspid Valve

Into the Right Ventricle

Then up through the *Pulmonary Semi lunar Valve

Into the Heart

Blood becomes OXYGENATED!

Blood runs through pulmonary trunk into the lungs

Then the Blood runs across the Alveoli (air sacks) of the lungs and picks up Oxygen

REFRESHED!

Blood flows via the Pulmonary Veins

Back into the Heart at the Left Atrium

Down through the Bicuspid Valve

Into the Left Ventricle…

Back to the heart

UP & OUT!

The Blood then flows through the Semi Lunar Valve

Up and out of the heart into the Aorta

And the beat goes on!

Brachiocephalic Artery

Left Common Carotid Artery

Left Subclavian Artery

There are 3 veins branching from the Aorta

Blood goes round and round Thus, beginning its journey through the

arteries to deliver oxygen to the cells of your body

When the blood in the arteries becomes deoxygenated they are then recognized as veins

And There You have it!

The Cardiac Conduction System