Devices: Difference between revisions

Jump to navigation Jump to search
175 bytes added ,  6 August 2012
no edit summary
No edit summary
No edit summary
Line 17: Line 17:


===Device measurements===
===Device measurements===
{| class="wikitable" border="1" cellpadding="1" cellspacing="1" width="10%"
|-
!Ohm’s law:
|-
|align="center"|U = I x R
''U = Voltage''
''I = Current''
''R = Impedance''
|}
====Stimulation threshold (in mV@ms):====  
====Stimulation threshold (in mV@ms):====  
The stimulation threshold is the minimum stimulus intensity (in mV) and duration (in ms) necessary to capture the heart.
The stimulation threshold is the minimum stimulus intensity (in mV) and duration (in ms) necessary to capture the heart.
Line 247: Line 261:


==Cardiac resynchronisation therapy (CRT)==
==Cardiac resynchronisation therapy (CRT)==
[[Image:Schematic.jpg|right|200px|thumb|Schematic display of an CRT device]]
[[Image:Schematic.jpg|right|thumb|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|300px|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]]


CRT-pacemaker (CRT-P) is a biventricular pacemaker with leads in both ventricles to ensure synchronized contraction. A CRT-defibrillator (CRT-D) is an ICD with biventricular pacing option.
CRT-pacemaker (CRT-P) is a biventricular pacemaker with leads in both ventricles to ensure synchronized contraction. A CRT-defibrillator (CRT-D) is an ICD with biventricular pacing option.
467

edits

Navigation menu