Bradycardia

Bradycardia is when the heart beats below 60 times per minute and generally does not adequately meet the body's needs. It can arise from a problem in the sinus node, the heart's natural pacemaker, or in the electrical conduction pathway. In some people it causes no symptoms, while in others it can present with complaints such as fatigue, dizziness, or fainting.

Bradycardia causes no symptoms in some people, while in others complaints related to the heart's inability to pump enough blood may occur. Recognizing symptoms and being aware of risk factors is important for getting evaluated at the right time.

• Fatigue and Reduced Exercise Capacity — Because the heart cannot beat as fast as the body needs, quick tiring and a sense of low energy may be felt during daily activities.
• Dizziness and a Feeling of Fainting (Presyncope) — A temporary reduction in blood flow to the brain can lead to dizziness, blurred vision, or a feeling of fainting when standing up or with exertion.
• Older Age — Structural changes that develop in the heart's natural conduction system with age are among the most common causes that increase the risk of bradycardia.
• Use of Heart-Rate-Slowing Medications or Coexisting Conditions — Medications such as beta-blockers and certain calcium channel blockers, as well as thyroid dysfunction, can slow the heart rate in an undesired way.

Bradycardia is diagnosed through a set of tests based on documenting the heart rhythm and investigating the underlying cause; which methods are used varies according to the patient's symptoms and clinical picture.

• Electrocardiography (ECG)
• Holter rhythm recording (24-48 hours or longer-term monitoring)
• Echocardiography (echo) to assess heart structure
• Exercise stress test (treadmill test)
• Blood tests (thyroid function and electrolyte levels)
• Electrophysiology study (EPS) in selected cases

The situations below summarize the main clinical presentations in which further cardiological or interventional electrophysiological evaluation for bradycardia may be considered.

• Symptomatic Bradycardia — Symptoms such as dizziness, fainting, or excessive fatigue occurring together with a low heart rate documented on ECG.
• Advanced Conduction Disorder — Electrocardiographically confirmed advanced-degree atrioventricular (AV) block or significant sinus node dysfunction.
• Rhythm Slowing Unresponsive to Treatment — The heart rate continuing to remain low despite medication adjustment and treatment of the underlying cause.
• Need for Further Testing — A need arising for an electrophysiology study (EPS) to clarify the extent of conduction system involvement, or for coronary evaluation when coexisting coronary disease is suspected.

Bradycardia treatment is planned in stages based on the underlying cause and the severity of symptoms; follow-up may be sufficient in mild, asymptomatic cases, while interventional options may be considered for advanced conduction disorders.

• Evaluation — Identifying the Underlying Cause — Conditions that could predispose to bradycardia, such as thyroid dysfunction, electrolyte imbalance, or structural heart disease, are investigated.
• Medical Treatment — Adjusting Medications and Triggering Factors — The dose of heart-rate-slowing medications such as beta-blockers is reviewed under physician supervision and readjusted if necessary.
• Interventional Electrophysiology — Advanced Electrophysiological Evaluation — In selected cases where the extent of conduction system involvement needs to be clarified, a detailed evaluation can be performed with an electrophysiology study (EPS).
• Interventional Electrophysiology — Permanent Pacemaker Implantation — In symptomatic patients with an advanced conduction disorder and no reversible cause found, permanent pacemaker implantation is considered.

Regular follow-up after bradycardia treatment is important for keeping the rhythm stable and for early detection of any possible recurrence. During follow-up, attention is generally given to the following points.

• Regular Follow-up Examinations — In patients with a permanent pacemaker, checking the device's operating parameters and battery life at set intervals is recommended.
• Review of Medication — The dose and necessity of medications that may contribute to bradycardia are reassessed under physician supervision during the treatment process.
• Monitoring Symptoms — Tracking whether complaints such as dizziness, palpitations, or fainting recur is an important part of the treatment process.
• Management of Underlying Causes — Keeping conditions such as thyroid dysfunction or electrolyte imbalance, which can predispose to bradycardia, under control can help reduce the risk of recurrence.

The information here is for general informational purposes; the diagnosis and treatment plan are determined following an individualized evaluation.