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The cardiac pacemaker is the heart 's natural rhythm generator. It employs pacemaker cells that produce electrical impulses, known as cardiac action potentials, which control the rate of contraction of the cardiac muscle, that is, the heart rate. In most humans, these cells are concentrated in the sinoatrial (SA) node, the primary pacemaker ...
- Sinus Pause and Arrest
- SA Nodal Exit Block
- Abnormal Sinus Rhythms
- Wandering Atrial Pacemaker
This condition happens when the SA node does not initiate the electrical impulse that leads to a heart contraction. A pause or arrest can last a few seconds to several minutes. A pause of a few seconds does not always produce symptoms. A longer pause can result in: 1. dizziness 2. lightheadedness 3. fainting In some cases, this condition can even b...
An SA nodal exit block happens when the SA node initiates the electrical impulse, but the impulse does not reach the neighboring tissue in the right atrium. Therefore, the heart does not receive the signal to contract. This causes a pause in the heartbeat.
Abnormal sinus rhythms are small variations in heart rhythms. They occur more frequently in younger people or those who use morphineor a drug called digoxin. If a person uses digoxin, abnormal sinus rhythm may result from digoxin toxicityTrusted Sourceand require treatment. People in this situation should contact a healthcare professional as soon a...
A wandering atrial pacemaker describes a situation where the pacemaker function of the heart comes from different locations in the right atrium rather than the SA node. This condition is usually asymptomatic and typically does not require treatment.
Jul 8, 2023 · A pacemaker is a small, battery-powered device that prevents the heart from beating too slowly. You need surgery to get a pacemaker. The device is placed under the skin near the collarbone. A pacemaker also is called a cardiac pacing device. There are different types of pacemakers. Single chamber pacemaker. This type usually sends electrical ...
Components of an artificial pacemaker. Pacemakers consist of an implantable pulse generator (IPG), which contains the electronics, a battery, and one or two leads. The pulse generator generates the electric current needed to stimulate the myocardium. The current is delivered to the myocardium via the leads, which are guided to the right atrial ...
A pacemaker consists of two parts: Pulse generator: This is the larger portion of the device that contains the battery ; Leads: These are wires that connect the pulse generator to the heart. A pacemaker may have one to three leads, depending on its model and function. Most pacemakers are implanted in the left side of a person’s chest.
Apr 24, 2023 · Artificial Pacemaker. An artificial pacemaker is a small electrical device commonly fitted to monitor and correct heart rate and rhythm. It is inserted into the chest under the left clavicle, with wires connected to the heart via the venous system. The most common indication for a pacemaker is bradycardia. Once inserted, the pacemaker monitors ...
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Mar 24, 2022 · A traditional pacemaker generator is placed outside of your heart, either in your chest or abdomen. It is connected via wires to electrodes inside one to three heart chambers. Single- and double-lead pacemakers send pulses to the right side of the heart. A biventricular pacemaker sends pulses to both ventricles and an atrium.
