Final answer:
The 6-second method is the recommended way to calculate heart rate with irregular rhythms.
Step-by-step explanation:
The method of calculating heart rate that can be used with irregular rhythms is the 6-second method. This method involves counting the number of beats you feel in a 6-second period and then multiplying that number by 10 to get the heart rate per minute. For example, if you count 12 beats in 6 seconds, your heart rate would be 120 beats per minute.
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