“…Although pacemaker implantation is not indicated for asymptomatic sinus bradycardia, syncope may result in injuries such as fractures. It is important to ascertain the symptoms that occur because of bradycardia, sinoatrial block, sinus arrest, or impaired heart rate response during exercise due to a decline in the primary function of the sinus node (syncope, convulsions, blacking out, dizziness, shortness of breath, fatigue, heart failure, etc) 119,120,129‐135 . Primary sinus node dysfunction is associated with essential reduction in sinus node function.…”