Difference Between Bundle of His and Purkinje Fibres

Bundle of His is the main conduction fiber group reaching the ventricles from the atrioventricular node. Purkinje fibres are the final common pathway for the controlling impulses from the sinoatrial node to the heart muscle cells to maintain regular contraction. ...

1. What is the function of the bundle of His and the Purkinje Fibres?
2. What is the bundle of his?
3. What are Purkinje fibers?
4. Why is it called the bundle of his?
5. Why is it called Purkinje fibers?
6. Where are Purkinje fibers located?
7. What is bundle of his who discovered it?
8. Is bundle of his a pacemaker?
9. Where is the bundle of his found?
10. Why are Purkinje fibers so fast?
11. Who discovered Purkinje fibers?

What is the function of the bundle of His and the Purkinje Fibres?

The bundle of His and the Purkinje fibres spread the wave impulses along the ventricles, causing them to contract.

What is the bundle of his?

In 1893, Wilhelm His Jr. discovered the physical link that electrically bridges the atria and ventricles of the heart. [1] This specialized muscle bundle connecting the atrial and ventricular chambers of the heart is now known as the bundle of His.

What are Purkinje fibers?

Purkinje fibers are part of the specialized conduction network of the heart that ensures that the wave of excitation spreads rapidly and almost synchronously to the ventricular muscle mass.

Why is it called the bundle of his?

It conducts the electrical impulses that regulate the heartbeat from the right atrium to the left and right ventricles. The bundle of His is named after its discoverer, German cardiologist Wilhelm His (1836–1934).

Why is it called Purkinje fibers?

Purkinje fibers are named after a Czech (country in Western Europe) scientist Jan Evangelista Purkyně, who discovered them in 1839.

Where are Purkinje fibers located?

The purkinje fibres are found in the sub-endocardium. They are larger than cardiac muscle cells, but have fewer myofibrils, lots of glycogen and mitochondria, and no T-tubules. These cells are connected together by desmosomes and gap junctions, but not by intercalated discs.

What is bundle of his who discovered it?

Wilhelm His Jr. (1863-1934) was a Swiss-born cardiologist and anatomist. In 1893, he discovered the bundle of His-the specialized tissue in the heart that transmits the electrical impulses and helps synchronize contraction.

Is bundle of his a pacemaker?

His bundle pacing is an innovative approach in which permanent pacemaker leads are placed at the Bundle of His (or His bundle) instead of in the right ventricle (the traditional approach).

Where is the bundle of his found?

Function. The bundle of His is an important part of the electrical conduction system of the heart, as it transmits impulses from the atrioventricular node, located at the anterior-inferior end of the interatrial septum, to the ventricles of the heart.

Why are Purkinje fibers so fast?

Purkinje cells lack transverse tubules that are present in myocardial cells. Because of their primary role in rapid conduction of the electrical impulse, Purkinje cells have fewer myofibrils than myocardial cells. ... The fast propagation is partially due to the different connexins in the gap junctions in these cells.

Who discovered Purkinje fibers?

Jan Evangelista Purkinje was born on 18 December, 1787, in Libochovice (Bohemia). Between the ages of 35 and 63, he made his most significant discoveries. This very age generally displays the physiological measure of the biggest creative waves of the human being.