What are the ways to measure heart rate through ECG

Heart rate measurement is a very important step in ECG measurement. Currently, there are five main methods for measuring heart rate.

Method 1: Sub-gauge measurement
Use the minute gauge to measure the P-P or P-R distance, multiply the measured number of seconds by 100, and then use the look-up table method to calculate the heart rate.

Method 2: Sub-gauge measurement
Use the minute gauge to measure the P-P or P-R distance, divide the measured number of seconds by 60, and the quotient obtained is the heart rate.

Method 3: Simple visual inspection
The commonly used paper speed of the electrocardiograph is 25mm/s, that is, 5 large divisions, so the time for each large division is 0.2s. At present, the P-P or P-R interval occupies a few large divisions, and the heart rate can be calculated.
For 3, 4, or 5 divisions, the heart rate is 100 beats/min, 75 beats/min, and 60 beats/min.

Method 4: ECG measuring ruler
The heart rate can be measured with an electrocardiogram measuring ruler.

Method 5: Measurement method when arrhythmia is irregular
1. Divide the average of multiple P-P or P-R intervals by 60 to get the heart rate
2. For atrial fibrillation, continuously count the number of R waves in the 10s example, multiply it by 6, and calculate the average ventricular rate.