Electrical Impulse       Article     History   Tree Map
  Encyclopedia of Keywords > Sinus Node > Electrical Impulse   Michael Charnine

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  1. The electrical impulse is then conducted to the ventricles through a form of 'junction box' called the AV node. (Web site)
  2. This electrical impulse is propagated throughout the right and left atria, stimulating the myocardium of the atria to contract. (Web site)
  3. The electrical impulse is created by the diffusion of calcium ions, sodium ions, and potassium ions across the membrane of cells in the pacemaker region. (Web site)
  4. The electrical impulse is then transmitted to the ventricles causing them to contract. (Web site)
  5. When an electrical impulse is released from this natural pacemaker, it causes the upper chambers of the heart (the atria) to contract.


  1. If there is a block in one of these branches, the electrical impulse must travel to the ventricle by a different route. (Web site)


  1. First-degree heart block, or first-degree AV block, is when the electrical impulse moves through the AV node more slowly than normal. (Web site)


  1. The neurostimulator reads the EEG, sees an onset of a seizure, and then sends an electrical impulse to the brain in an attempt to disrupt the seizure.

Atrial Flutter

  1. In atrial flutter, the AV node typically will block every other electrical impulse, or three out of four impulses.

Nerve Conduction Studies

  1. In nerve conduction studies a probe is used to stimulate a nerve causing an electrical impulse to fire.


  1. This electrical impulse travels from one side of the heart to the other so rapidly that it gives the impression all the cells are beating at once.

Special Cells

  1. Electrocardiogram (ECG). Each beat of your heart is triggered by an electrical impulse generated from special cells in your heart. (Web site)

Nerve Conduction Velocity

  1. Nerve conduction velocity (NCV) test is a measurement of the speed of conduction of an electrical impulse through a nerve.


  1. It delivers an electrical impulse to stimulate (pace) the heart's muscle contractions if the heart rate drops below a certain number of beats per minute. (Web site)


  1. The electrical impulse then travels from the AV node through a specialized system of electrical tissue called the His-Purkinje system.

Radio Signal

  1. This layer conveys the bit stream - electrical impulse, light or radio signal -- through the network at the electrical and mechanical level.


  1. The PR interval represents the amount of time the electrical impulse takes to travel from the SA node through the AV node.


  1. For the left and right ventricles to contract at the same time, an electrical impulse must travel down the right and left bundle branches at the same speed. (Web site)
  2. These cells automatically send out an electrical impulse to the rest of the heart telling it to contract.

Normal Sinus Rhythm

  1. It takes 0.03 seconds for the electrical impulse to travel from the SA node to the AV node, and this is known as normal sinus rhythm.

Electrical Cardioversion

  1. If it does not stop on its own, VT usually requires prompt treatment with either medication or an electrical impulse to the heart (electrical cardioversion).


  1. Somewhere between 60 and 100 times a minute, this pacemaker emits an electrical impulse. (Web site)


  1. Cardioversion: The stopping of a fast heart rate by an electrical impulse that is delivered at the same time as the heartbeat.
  2. These bursts often start when the electrical impulse from a heartbeat begins to circle repeatedly through an extra pathway.
  3. In a polarized state, heart cells are ready and able to conduct the electrical impulse that will cause a heartbeat. (Web site)


  1. In order for the heart to squeeze and pump blood, it needs a sort of spark plug, an electrical impulse, to start a heartbeat. (Web site)
  2. Reentrant arrhythmias occur when an electrical impulse travels in a circle within the heart, rather than moving outward and then stopping. (Web site)
  3. As long as the electrical impulse is transmitted normally, the heart pumps and beats at a regular pace.

Right Atrium

  1. When the heart pumps blood to the rest of the body, a small area in the right atrium sends an electrical impulse across your entire heart muscle.
  2. The electrical impulse travels from the SA node to the atrioventricular (AV) node in the bottom of the right atrium.
  3. In a normal heart beat, or normal sinus rhythm, an electrical impulse originates at the SA node which is located in the upper right atrium. (Web site)


  1. The electrical impulse travels from the atria to the atrioventricular (AV) node located in the inferior wall of the right atrium.
  2. Doctors use a term called the P-Q or P-R interval, which is the time taken for an electrical impulse to travel from the atria to the ventricle. (Web site)


  1. The AV node conducts the electrical impulse to the ventricles which then contract and pump blood out into the lungs and throughout the body.
  2. Ventricular tachycardia occurs when the electrical impulse starts in the ventricles instead of the atria. (Web site)

Heart Contracts

  1. Normally, as the electrical impulse moves through the heart, the heart contracts about 60 to 100 times a minute. (Web site)
  2. The heart contracts (beats) as the electrical impulse moves through it.


  1. Each heartbeat is stimulated by an electrical impulse that originates in a small strip of heart tissue known as the sinoatrial (S-A) node, or pacemaker. (Web site)
  2. The sinoatrial (SA) node puts out an electrical impulse that makes the upper chambers of your heart (the atria) contract. (Web site)
  3. Normally, the electrical impulse begins at the sinoatrial (SA) node, located in the right atrium.

Av Node

  1. The delay provided by the AV node enables both atria to empty completely before the electrical impulse reaches the ventricles.
  2. The AV node then transfers the electrical impulse to the ventricles which completes a heart beat. (Web site)
  3. The AV node slows down the electrical impulse so that the ventricles have time to fill with blood before contracting. (Web site)

Sa Node

  1. The heart also contains specialized fibers that conduct the electrical impulse from the pacemaker (SA node) to the rest of the heart (see Figure 4). (Web site)
  2. The firing of the SA node sends out an electrical impulse via its neurons to the right atrium, left atrium, and AV node simultaneously. (Web site)
  3. Anywhere between 60 and 100 times a minute, the SA node sends an electrical impulse throughout your heart to cause it to beat (contract). (Web site)

Sinus Node

  1. In the normal heart, the electrical impulse is initiated in a small group of cells located in the top of the right atrium, called the sinus node.
  2. The PR interval reflects the time the electrical impulse takes to travel from the sinus node through the AV node and entering the ventricles. (Web site)
  3. A delay or complete block of the electrical impulse as it travels from the sinus node to the ventricles.

Electrical Impulse

  1. The electrical impulse that signals your heart to contract begins in the sinoatrial node (also called the sinus node or SA node). (Web site)
  2. A heart beat results when an electrical impulse from the atria passes through the atrioventricular (AV) node to the ventricles and causes them to contract. (Web site)
  3. In late diastole, the SA node sends an electrical impulse to the atria, which causes the atria to contract and the ventricles to fill with more blood. (Web site)


  1. Sinus Node
  2. Av Node
  3. Sa Node
  4. Heart Contracts
  5. Sinoatrial
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  Originally created: April 04, 2011.
  Links checked: May 01, 2013.
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