HEART Physiology made easy| Cardiac cycle | Conducting system of Heart |
Channel: Medical Lecture by Anurag
Date: 2022-09-18

This video only deals with basic physiology of heart.
What is the conduction system of the heart?
Your heart’s conduction system is the network of nodes (groups of cells that can be either nerve or muscle tissue), specialized cells and electrical signals that keep your heart beating.

Two types of cells control your heartbeat:

Conducting cells carry the electric signals.
Muscle cells control your heart’s contractions.
Your heart (cardiac) conduction system sends the signal to start a heartbeat. It also sends signals that tell different parts of your heart to relax and contract (squeeze). This process of contracting and relaxing controls blood flow through your heart and to the rest of your body.

FUNCTION
What are the steps of the heart conduction pathway?
Your heart is a pump that sends blood through your body. For each heartbeat, electrical signals travel through the conduction pathway of your heart. It starts when your sinoatrial (SA) node creates an excitation signal. This electrical signal is like electricity traveling through wires to an appliance in your home.

The excitation signal travels to:

Your atria (top heart chambers), telling them to contract.
The atrioventricular (AV) node, delaying the signal until your atria are empty of blood.
The bundle of His (center bundle of nerve fibers), carrying the signal to the Purkinje fibers.
The Purkinje fibers to your ventricles (bottom heart chambers), causing them to contract.
These steps make up one full contraction of your heart muscle. Your heart conduction system sends out thousands of signals per day to keep your heart beating.

How does electrical conduction perform with the rest of your heart?
The electrical signals that travel through your heart conduction system cause your heart to expand and contract. These contractions control how blood flows through your heart.

Ideally, the electrical conduction system keeps up a steady, even heart rate. It also helps your heart speed up when you need more blood and oxygen or slow down when it’s time to rest.

Reference- https://my.clevelandclinic.org/health/body/21648-heart-conduction-system
.
.
.
.
.
#anatomyandphysiology #cardiaccycle #conductingsystemofheart #heartdrawing #cardiovascularsystem #nursinganatomy #nursingnotes #nursingstudent #nursingcoaching #mbbs #mbbsnotes #nursingofficer #aimms #norcet #nursingcompetitiveexams