Fatal delayed hemodynamic depression after carotid artery stenting

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Neurosurgery

Background:

• Carotid artery stenting (CAS) is a common procedure to treat carotid artery stenosis.
• Hemodynamic instability and cardiac complications can occur post-CAS.
• Identifying risk factors for these complications is crucial for patient management.

Purpose of the Study:

• To report a rare case of refractory hemodynamic depression and complete heart block following CAS.
• To explore potential contributing factors in a patient with pre-existing cardiac conditions.

Main Methods:

• A 62-year-old male patient underwent left carotid artery stenting.
• Post-procedure monitoring for hemodynamic stability and cardiac rhythm.
• Analysis of patient's pre-existing conditions and potential triggers for adverse events.

Main Results:

• The patient developed severe hemodynamic depression and complete heart block approximately eight hours after CAS.
• No prior hemodynamic instability was noted before the event.
• Contributing factors identified: moderate left ventricular systolic dysfunction and vasopressor-induced sympathetic stimulation triggering complete heart block in the setting of occult distal conduction system disease.

Conclusions:

• This case highlights a delayed and severe cardiac complication post-CAS.
• Pre-existing left ventricular dysfunction and subtle conduction system disease may predispose patients to adverse cardiovascular events after CAS, especially when combined with vasopressors.
• Careful patient selection and vigilant post-procedural monitoring are essential.