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Basics: Difference between revisions
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→How do I begin to read an ECG?
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Click on the ECG to see an enlargement. | Click on the ECG to see an enlargement. | ||
Where do | 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 [[ | * 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' ( | * 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 | * 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. | ||
{{clr}} | {{clr}} | ||