Basics: Difference between revisions

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=How do I begin reading an ECG?=
=How do I begin to read an ECG?=
[[Image:Normaal ecg.jpg|thumb| An example of a normal ECG. ''Click on the Image for an enlargement'']]
[[Image:Normaal ecg.jpg|thumb| An example of a normal ECG. ''Click on the Image for an enlargement'']]


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* at the right of that are below each other the [[heart frequency]], the [[Conduction time intervals (PQ,QRS,QT)|conduction time intervals]] (PQ,QRS,QT/QTc), and the [[cardiac axis]] (P-top axis, QRS axis and T-top axis)
* at the right of that are below each other the [[heart frequency]], the [[Conduction time intervals (PQ,QRS,QT)|conduction time intervals]] (PQ,QRS,QT/QTc), and the [[cardiac 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 ax), the sensitivity (10mm/mV) and the filter's frequency (40Hz, filters noise from eg. lights)
* 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)
* 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 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.
* 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.