Painful Left Bundle Branch Block Syndrome Complicated by Iron-Overload Cardiomyopathy

Area of Science:

• Cardiology
• Electrophysiology
• Internal Medicine

Background:

• Painful left bundle branch block (LBBB) syndrome is a rare condition characterized by chest pain and transient LBBB without evidence of myocardial ischemia.
• Iron-overload cardiomyopathy is a potential, though uncommon, cause of cardiac conduction abnormalities and associated symptoms.

Purpose of the Study:

• To describe a unique case of painful LBBB syndrome in a patient with iron-overload cardiomyopathy.
• To explore the therapeutic implications and management strategies for this rare condition.

Main Methods:

• Case report of a 72-year-old Japanese man diagnosed with painful LBBB syndrome.
• Initial treatment involved phlebotomy to address iron deposition and conductive disturbance.
• Observation of clinical response to treatment and resolution of symptoms.

Main Results:

• The patient presented with chest pain and transient LBBB, diagnosed as painful LBBB syndrome.
• Phlebotomy was performed to manage iron-overload cardiomyopathy.
• Resolution of incessant LBBB and the development of a walk-through phenomenon coincided with complete improvement of chest pain.

Conclusions:

• This case underscores the importance of considering iron-overload cardiomyopathy in the differential diagnosis of painful LBBB syndrome.
• Individualized treatment approaches are crucial due to the lack of established guidelines for managing cardiomyopathy-induced painful LBBB syndrome.
• The patient's response suggests a potential link between iron reduction, conduction improvement, and symptom resolution in specific cases.