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 In 1905 Einthoven recorded the first 'telecardiogram' from the hospital to his laboratoy 1.5 km away.
-In 1906 publiceert Einthoven het eerste artikel waarin een serie (afwijkende) ECG bevindingen worden beschreven: linker en rechter ventrikelhypertrofie, linker en rechter atriumdilatatie, de U golf, notching van het QRS comples, ventriculaire extrasystolen, bigemini, boezemflutter en totaal AV blok. ''Einthoven W. Le telecardiogramme. Arch Int de Physiol 1906;4:132-164''
+In 1906 Einthoven published the first article in which he described a series of abnormal ECGs: left- and right bundlebranchblock, left- and right atrialdilatation, the U wave, notching of the QRS complex, ventricular extrasystoles, bigemini, atrialflutter and total AV block. ''Einthoven W. Le telecardiogramme. Arch Int de Physiol 1906;4:132-164''
 {{clr}}
 =The ECG electrodes=
 [[Image:ECGelectrodes.jpg|thumb|click on the Image for an enlargement]]
-Electric activity that goes through the heart, can be measured by external (skin)electrodes. The electrocardiogram (ECG) registers these activities from these electrodes which have been attached on diffrent places on the body. In total, twelve leads are to be calculated using ten electrodes.
+Electric activity going through the heart, can be measured by external (skin)electrodes. The electrocardiogram (ECG) registers these activities from these electrodes which have been attached on diffrent places on the body. In total, twelve leads are calculated using ten electrodes.
 The ten electrodes are:
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 ** N - neutral, on the right leg (= electrisch aarde of nulpunt ten opzichte waarvan de electrische spanning wordt gemeten)
 ** F - foot, on the left leg
-It makes no diffrence whether the electrodes will be attached proximal or distal on the extremities. ''Echter'', it is better not to ''afwisselen'' it. (eg. an electrode on the left shoulder and one on the right wrist).
+It makes no difference whether the electrodes are attached proximal or distal on the extremities. ''However'', it is best to be uniform in this. (eg. do not attach an electrode on the left shoulder and one on the right wrist).
 * '''the chest leads:'''
-** V1 - geplaatst in de 4e intercostaalruimte rechts van het borstbeen
+** V1 - placed in the 4th intercostal space, right of the sternum
-** V2 - geplaatst in de 4e intercostaalruimte links van het borstbeen
+** V2 - placed in the 4th intercostal space, left of the sternum
-** V3 - geplaatst halverwege tussen V2 en V4
+** V3 - placed between V2 and V4
-** V4 - geplaatst in de 5e intercostaalruimte in de tepellijn
+** V4 - placed 5th intercostal space in the nippleline
-** V5 - geplaatst halverwege tussen V4 en V6
+** V5 - placed between V4 ann V6
-** V6 - geplaatst in de axillairlijn op dezelfde hoogte als V4
+** V6 - placed in the axillar line on the same height as V4
 {{clr}}
-Met behulp van deze 10 electrodes kunnen dus 12 afleidingen uitgeschreven worden. Er zijn 6 extremiteitsafleidingen en 6 voorwandsafleidingen.
+Using these 10 electrodes, 12 leads can be derived. There are 6 extremity leads and 6 precordial leads.
 ==The extremity leads==
 [[Image:ECGafleidingen.jpg|thumb]]
-De extremiteitsafleidingen zijn:
+The extremity leads are:
-*'''I''' van rechter naar linker arm
+*'''I''' from the right ot the left arm
-*'''II''' van rechter arm naar linker been
+*'''II''' from the right arm to the left leg
-*'''III''' van linker arm naar linker been
+*'''III''' from the left arm to the left leg
+An easy rule to remember: lead '''I''' + lead '''III''' = lead '''II'''
-Een makkelijk te onthouden ezelsbruggetje: Afleiding '''I''' + Afleiding '''III''' = Afleiding '''II'''
 Hierbij wordt gebruik gemaakt van de hoogten en/of diepten, onafhankelijk van de golf (QRS, P of T).
 Voorbeeld: is in Afleiding I het QRS complex 3mm hoog, in Afleiding III 9mm, dan zal de hoogte van het QRS-complex in afleiding II 12mm bedragen.