Basics: Difference between revisions

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Click on the ECG to see an enlargement.
Click on the ECG to see an enlargement.
Where do we look when watching an ECG?
Where do you start when interpreting an ECG?
* top left are the patient's information, name, sex and date of birth
* on the top left are the patient's information, name, sex and date of birth
* at the right of that are below each other the [[Frequency]], the [[Conduction|conduction times ]] (PQ,QRS,QT/QTc), and the [[Heart axis]] (P-top axis, QRS axis and T-top axis)
* at the right of that are below each other the [[Frequency]], the [[Conduction|conduction times]] (PQ,QRS,QT/QTc), and the [[heart axis]] (P-top axis, QRS axis and T-top axis)
* further to the right is the interpretation of the ECG written (this often misses in a 'fresh' ECG, but later the interpretation of the cardiologist or computer will be added)
* further to the right is the interpretation of the ECG written (this often misses in a 'fresh' ECG, but later the interpretation of the cardiologist or computer will be added)
* down left is the 'paper speed' (25mm/s on the horizontal axis), the sensitivity (10mm/mV) and the filter's frequency (40Hz, filters noise from eg. lights)
* down left is the 'paper speed' (25 mm/s on the horizontal axis), the sensitivity (10mm/mV) and the filter's frequency (40Hz, filters noise from eg. lights)
* finally there is a calibration on the ECG, on the beginning of every lead is a vertical block that shows how high 1mV is. So the height and depth of these signals are a measurement for the voltage. If this is not the set 10mm, there is something wrong with the machine.
* finally there is a calibration on the ECG, on the beginning of every lead is a vertical block that shows with what amplitude a 1 mV signal is drawn. So the height and depth of these signals are a measurement for the voltage. If this is not the set at 10 mm, there is something wrong with the machine setting.
* further we have the ECG leads themselves of course, these will be discussed below.
* further we have the ECG leads themselves of course, these will be discussed below.


Note that the lay-out is different for every machine, but all of the information above can be found.
Note that the lay-out is different for every machine, but mostly all of the information above can be found.
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