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Cortical blindness following coronary angiography
1Cardiac Department, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074.
Singapore Medical Journal
|April 12, 2001
Summary
Transient cortical blindness occurred in a patient following coronary angiography. This adverse reaction may stem from contrast agent neurotoxicity affecting the occipital cortex.
Area of Science:
- Neurology
- Radiology
- Ophthalmology
Background:
- Coronary angiography is a common procedure for diagnosing heart conditions.
- Iodinated contrast agents are frequently used, carrying potential risks.
- Transient visual disturbances are rare but documented adverse effects.
Observation:
- A 53-year-old male experienced temporary vision loss affecting the occipital cortex.
- This event occurred shortly after undergoing coronary angiography.
- The patient's symptoms resolved spontaneously.
Findings:
- The clinical presentation suggests an adverse reaction to the iodinated contrast agent.
- A potential mechanism involves the contrast agent crossing the blood-brain barrier.
- Direct neurotoxicity to the occipital cortex is hypothesized as the cause.
Implications:
- This case highlights a rare neurological complication of contrast media.
- Understanding the mechanism may inform preventative strategies.
- Further research into contrast agent neurotoxicity is warranted.