Sinus bradycardia is a medical condition where it involves slow heartbeats, slower than 60 beats a minute. If there is a decreased heartbeat, there is decreased output of blood which will result in fatigue, vertigo, dizziness, hypo tension, and syncope.

However, bradycardia is harmless. Athletes or people who are physically active can have sinus bradycardia because their hearts are trained to pump enough blood in each contraction allowing them to have a low resting heart rate or increased vagal tone.

There are several reasons why normal and healthy people experience bradycardia and also several medical conditions that will make bradycardia a secondary form or complication. Sleep, hypothyroidism, hypothermia, seizure, secondary to diphtheria or infection and AV blocking medications such as digoxin, beta-blockers, and calcium channel blockers are just some of the common causes of suffering bradycardia.

The development of bradycardia is usually due to an underlying cause. For the young and the physically active individuals, sinus bradycardia is normal and it comes and it goes without causing any health inconvenience to the person involved. However to individuals with medical conditions such as myocardial infarction, toxic or environmental exposure, sleep apnea, drug effects, hypoglycemia, hypothyroidism, electrolyte imbalance and intracranial pressure bradycardia will be mostly one of the signs and symptoms.

In addition, sinus bradycardia may also be caused by the sick sinus syndrome which means there is an abnormality or dysfunction in the sinus node. The sinus node is the heart’s natural pacemaker. When the sinus node fails to do its job, SA block occurs.


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If you think you are suffering from Sinus Bradycardia you may be eligible for health benefits. According to the SSA, this condition is considered as a criterion to qualify you for SSDI and SSI.