What are the possible cause of a low heart rate?

1. Super-fit.
2. Age
3. Being asleep or comatose or dead.
4. Brachychardia (whatever explicitly?!)
Any other possibilities? How about a chance sleep routine, or meditation, or medications/drugs/anaesthetics?
all of the above (except as previously mentioned, bradycardia is simply defined as low heart rate- it's not a cause)
i would also include:
1. iatrogenic. some medication can lower the heart rate, most notably beta-blockers. things similar to atenolol, metoprolol, or propranolol can cause low heart rate.
2. 2nd or 3rd scope AV block- an abnormality with the conduction system of the heart may organize to low heart rate
3. cushing's response. in response to increased intracranial pressure, you can see hypertension and bradycardia.
People enjoy very peculiar planning about heart rate. I do aerobic exercise and the lowest heart rate I have at sea height was 37 beat /min.The lower the heart rate the better. All the longest lived mammals have unbelievably low heart rates.
That takes meticulousness of reason #1. The others I can't aid you with.
pills and health guarantee correctness , is for informational purposes just

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