It is considered tachycardia when the heart rate is faster than considered normal for age. Sinus refers to the normal place of generation of electrical impulses responsible for triggering the contraction of the heart muscle.
The cause is often benign. It may be triggered by a body response to “stress” situations (pain, anxiety, exercise). But it can also be the response to diseases (fever, dehydration, myocarditis, anemia, hyperthyroidism, pulmonary embolism, etc.).
Generally, it does not cause symptoms, being a finding when measuring the pulsations. If the heart rate is very high, it can cause dizziness or a feeling of tiredness. It is important to check all vital signs and pay attention to possible accompanying symptoms to ensure that the tachycardia is not due to a medical problem.
If the arrhythmia is not secondary to a medical disorder, it does not require treatment.
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