The R-R interval heart rate refers to the time period between successive R waves in the QRS complex of the heart’s electrical cycle, as measured on an electrocardiogram (ECG). It is essentially the time between heartbeats and is usually measured in milliseconds. Variations in the R-R interval are used to calculate heart rate variability, which can provide important information about the functioning of the autonomic nervous system and overall cardiovascular health.
The formula to calculate the heart rate from the R-R interval is:
\[ HR = \frac{60}{RRI} \]
Where:
Let's assume the following value:
Using the formula:
\[ HR = \frac{60}{0.8} = 75 \text{ beats per minute} \]
The heart rate is 75 beats per minute.