A heart rate of 55 beats per minute is considered bradycardia, not heart failure.
The normal adult heart rate is 60-100 beats per minute, and if an adult’s heart rate is below 60 beats per minute it is called sinus bradycardia, or sinus bradycardia for short. Therefore, a heart rate of 55 beats is a sinus bradycardia, not heart failure. Sinus bradycardia can be seen in young people, athletes, and sleepers. Asymptomatic sinus bradycardia does not require treatment, while symptomatic sinus bradycardia can be considered for medication.
Heart failure, or heart failure for short, is a clinical syndrome in which the pumping function of the heart is impaired due to various diseases of the heart, and the volume of blood discharged by the heart fails to meet the needs of the organism, thus manifesting a series of symptoms. Heart failure can cause dyspnea, coughing, sputum, reduced exercise tolerance and so on. The treatment of heart failure requires a program based on the specific condition.
Therefore, a fast or slow heart rate cannot diagnose heart failure.
If you feel unwell, please consult a doctor.