The heart is ruled on bio-electrical impulses generated by the cells - pacemaker of the nodule sinusal, in the right auricle. The above mentioned bio-electrical impulses travel from the auricle to another nodule or set of cells in the auricles union with ventricles, which is called a nodule (aurículo-ventricular) A-V, and hence to the rest of the heart for a "route" of specializing textile that is called a His bundle.

In the cardiac blockades, the electrical impulses happen across the nodule A-V and the bundle of His very slowly, or intermitentemente, or do not happen by no means.

They can happen for healing in the "routes" or routes of conduction, for cardiovascular disease, or for congenital illnesses of the heart, or for effect of certain drugs and medicines (inc. digitalis, calcium - antagonist, ß-bloqueantes), as well as in some infections like the illness of Lyme or the mononucleosis.

The cardiac blockades split into grades.

The blockade of 1er grade does not give symptoms and does not talk each other; it is an only one find in the ECG, a light delay in the transmission of the impulse of auricles to ventricles.

In the blockade of 2nd grade, some of the impulses do not go on by no means to the ventricles, and the result is an irregular pulse. In some cases, there talks each other the cause that produces them (medications, etc); in others, it is necessary to put a pacemaker.

The blockade of 3er grade is entire, so that no impulse comes to the ventricles and these have to beat themselves, to a frequency so slow that it is not sufficient to pump the blood to the brain or to other areas. They can give place to losses of knowledge. Before a blockade of 3.er grade is always necessary to put a pacemaker artificial. - to see image -

Electrocardiogram of a Blockade AV of third grade.

Pacemaker inserted in the heart, in the image they see two types. The battery for his functioning goes applied under the skin.

TO SEE ALSO

• Cardiac arrhythmias. General information
• Ear extrasystoles
• Fibrillation and Flutter Ear (flapping)
• Tachycardia Paroxística Auricular (supraventricular)
• The Record Holter
• Pacemaker
• Medication Antiarrítmica

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