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15 bytes added ,  6 June 2007
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# Non regular rhytms are best determined with the "3 second marker method" Count the number of QRS-complexes that fit in 3 seconds (some ECG writers register this period on the ECG paper). Multiply this number by 20 and find the number of beats/minute.  
# Non regular rhytms are best determined with the "3 second marker method" Count the number of QRS-complexes that fit in 3 seconds (some ECG writers register this period on the ECG paper). Multiply this number by 20 and find the number of beats/minute.  


'''You can finetune the second method with the following more precise sequence:'''
{| class="wikitable" font-size="90%"
*'''300'''''-250-214-187-167-'''''150'''
|- style="text-align:center;background-color:#6EB4EB;"
*'''150'''''-136-125-115-107-'''''100'''
|+'''Finetuning the 'square counting' method'''
*'''100'''''-94-88-83-79-'''''75'''
|-
*'''75'''''-71-68-65-62-'''''60'''
|300|250|214|187|167|150|
|-  
|150|136|125|115|107|100|
|-
|100|94|88|83|79|75|
|-
|75|71|68|65|62|60|
|-
|}
 
{{clr}}
{{clr}}


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