If a person's pulse is too rare and does not amount to 60 beats per minute, or, conversely, it speeds up too much, then the victim needs to urgently call an ambulance, says a cardiologist.< /b>
Cardiologist Yuri Serebryansky explained in an interview which pulse is considered dangerous. According to the doctor, the potential danger is a sudden decrease in heart rate – bradycardia. The pulse can beat with a frequency that does not reach 60 beats (per minute). If bradycardia does not occur in resting circumstances, this is an alarming sign
“Normally, a person’s pulse calms down during sleep or just rest and can be 58 or 50 beats per minute. But if the decline happened suddenly, you need to call a doctor,” said Yuri Serebryansky.
The cardiologist emphasized that too low a pulse should be examined by a doctor until the reasons are clarified. This phenomenon may hide atrial fibrillation or heart disorders that require medical intervention, therapy.
Rare pulse: what does the problem mean?
“Slowing the pulse in the elderly can reach very low numbers , lead to cardiac arrest, sudden death,” the physician warned.
Serebryansky stressed that the other extreme is also dangerous – tachycardia, too frequent pulse – in this case, the number of beats exceeds 90 beats per minute, sometimes significantly. If such an increase has occurred in a person who has already been diagnosed with arrhythmia, it is better to call an ambulance. If the pulse jumped in circumstances of excitement or physical exertion, and does not calm down in any way, you also need to consult a doctor.
At what pulse is urgently needed an ambulance: the doctor explains that can cause a stroke at a young age. 
Yury Serebryansky Health cardiologist, Honored Doctor of the Russian Federation