Devices: Difference between revisions

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==Pacemakers==
==Pacemakers==
[[Image:Paced2.gif|300px|right|thumb|Ventricular paced rhythm shows ventricular pacemaker spikes.]]
[[Image:Paced2.gif|300px|right|thumb|Ventricular paced rhythm shows ventricular pacemaker spikes.]]
[[Image:SchematicImg.jpg|right|thumb|300px|Schematic display of a pacemaker.]]
[[Image:Pacemaker_device.svg|right|thumb|300px|Schematic display of a pacemaker.]]


A pacemaker monitors the electrical impulses in the heart. When needed, it sends small electrical impulses to the heart muscle to maintain a normal heart rate.  
A pacemaker monitors the electrical impulses in the heart. When needed, it sends small electrical impulses to the heart muscle to maintain a normal heart rate.  
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==Implantable cardioverter defibrillators (ICD)==
==Implantable cardioverter defibrillators (ICD)==
[[Image:Schematicpic.jpg|right|300px|thumb|Schematic display of an ICD]]
[[Image:ICD_device.svg|right|300px|thumb|Schematic display of an ICD]]


An ICD is a device that monitors heart rhythms. If it senses dangerous rhythms, it delivers shocks or anti-tachypacing (ATP) therapy. Many ICDs record the heart's electrical patterns when there is an abnormal heartbeat.
An ICD is a device that monitors heart rhythms. If it senses dangerous rhythms, it delivers shocks or anti-tachypacing (ATP) therapy. Many ICDs record the heart's electrical patterns when there is an abnormal heartbeat.
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==Cardiac resynchronisation therapy (CRT)==
==Cardiac resynchronisation therapy (CRT)==
[[Image:Schematic.jpg|right|thumb|200px|Schematic display of an CRT device]]
[[Image:CRT_device.svg|right|thumb|200px|Schematic display of an CRT device]]
[[Image:ChestXray.jpg|right|thumb|250px|Chest X-ray of a patient with an CRT device (in posteroanterior and lateral view)<br/>The red arrow is the right atrial lead<br/>The blue arrow is the right ventricular lead<br/>The green arrow is the coronary sinus lead]]
[[Image:ChestXray.jpg|right|thumb|250px|Chest X-ray of a patient with an CRT device (in posteroanterior and lateral view)<br/>The red arrow is the right atrial lead<br/>The blue arrow is the right ventricular lead<br/>The green arrow is the coronary sinus lead]]


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