Pacemakers

sending out signals to make the heart muscles contract.

av node

go to http://plightofminorities.webs.com/ and http://www.youtube.com/plightofminorities

my answer this there.

A pacemaker is implanted inside the skin of the side of a patient's chest, and has 'wires' running over to the heart.

A pacemaker is not in your blood.

Artificial cardiac pacemaker was created in 1959.

68

There would be no need. - A new pacemaker would be inserted instead.

The human heart started out as a enlarged blood vessel that appears as two blood vessels coming together. The heart is comprised of four chambers two small chambers called the atrium and two large chambers known as the ventricles. There are several tissue layers of the heart. The internal layer is known as the endocardium the muscle layer is known as the myocardium, and the outer layer is known as the epicardium. There is an outermost sac called the pericardium that makes up a cavity in the thoracic cavity known as the mediastinum. There are specialized conducting cells or tissue within the myocardium of the heart. These specialized tissue performs the electrical conduction of the heart. The first is the sinoatrial node or the SA node found in the right upper atrium, the next one is the atrioventricular node or the AV node found in the right lower atrium. Then there is a group of this tissue known as the bundle of His or AV bundle (found in the wall of the ventricular septum (the dividing wall between the two ventricles)) and then the right and left buncle branches ( found also in the wall of the intraventicular septum and the outer ventricles) until you come to the purkinjie fibers at the end in the walls of the ventricles. The primary pacemaker of the heart is the SA node and depending on what is going on with the heart as far as damage the secondary pacemaker is the AV node, however the bundle of His could become a pacemaker site or the right and left bundle branches. The lower you go in the pacemaker sites the slower and less able the heart is to conduct proper electrical stimulation to effect the heart conduction and contraction (beat of the heart).

Dr. Rick Reed

Being alive is certainly better than the alternative in the vast majority of cases. However, a pacemaker has nothing to do with the function of the kidneys.

Approach

The heart.

In this order:

Don't let the sun catch you crying

Ferry Cross the Mersey

How do you do it

He was most known for his inventions.

his most famous invention was the pacemaker

The sinoatrial node (SA)

A cardio-thoracic surgeon.

Yes! There is a chance of the lung coliasping. It depends alot on if it's put under the skin or under the muscle.