Sinus bradycardia is a kind of slow heartbeat. It happens when the sinoatrial node fires less than 60 times per minute. In some cases, sinus bradycardia is normal. But other times it can mean an underlying problem.
427.81 - Sinoatrial node dysfunction | ICD-10-CM.
R00. 1 - Bradycardia, unspecified. ICD-10-CM.
I49. 5 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2022 edition of ICD-10-CM I49.
Sinus node dysfunction, previously known as sick sinus syndrome, describes disorders related to abnormal conduction and propagation of electrical impulses at the sinoatrial node. An abnormal atrial rate may result in the inability to meet physiologic demands, especially during periods of stress or physical activity.
Sick sinus syndrome may also be called sinus node dysfunction or sinus node disease.
9: Fever, unspecified.
Normal sinus rhythm is defined as the rhythm of a healthy heart. It means the electrical pulse from your sinus node is being properly transmitted throughout the heart muscle. In adults, normal sinus rhythm usually accompanies a heart rate of 60 to 100 bpm.
Bradycardia can be caused by: Heart tissue damage related to aging. Damage to heart tissues from heart disease or heart attack. A heart condition present at birth (congenital heart defect)
Tachy-Brady Syndrome One symptom of sick sinus syndrome is a specific irregular heartbeat known as tachycardia-bradycardia syndrome, or tachy-brady for short. In this situation, the heart may beat too quickly (tachycardia), then too slowly (bradycardia).
If the sinus node is not functioning normally — due to damage from surgery, drugs, congenital heart defects or other causes — the heartbeat may become very slow with a decrease in blood pressure. Sinus node dysfunction may lead to an abnormally slow heart rhythm called bradycardia.
The sinoatrial node is called the heart's pacemaker. When something goes wrong with the sinoatrial node, you may develop a consistently slow heartbeat (sinus bradycardia) or the normal pacemaker activity may stop entirely (sinus arrest).
Sinus node dysfunction results from the abnormal automaticity, conduction, or both of the sinoatrial node and surrounding tissues. Both could result from abnormal mechanisms, including fibrosis, atherosclerosis, and inflammatory/infiltrative processes.
The SA (sinoatrial) node generates an electrical signal that causes the upper heart chambers (atria) to contract. The signal then passes through the AV (atrioventricular) node to the lower heart chambers (ventricles), causing them to contract, or pump. The SA node is considered the pacemaker of the heart.
A constellation of signs and symptoms which may include syncope, fatigue, dizziness, and alternating periods of bradycardia and atrial tachycardia, which is caused by sinoatrial node dysfunction.
The 2022 edition of ICD-10-CM I49.5 became effective on October 1, 2021.