|
Overview :
The heart rate can be calculated from the ECG strip since it
is printed at a constant speed.
For regular rhythm, the heart rate can be calculated by:
1) divide
the number of 0.4 second time lines (1 mm) in a P-P or R-R interval into
1500.
2) divide
the cycle length (time between peaks of 2 successive P or R waves) expressed in
seconds into 60.
If the heart rate is irregular, measure several R-R
intervals:
1) number of 0.4 second lines over the intervals
2) count the number of R-R intervals
3) divide #1 by #2 to get an average interval
4) divide #3 into 1500
|