[Familial poisoning by carbon monoxide with different ECG changes]

Area of Science:

• Toxicology
• Cardiology
• Environmental Health

Background:

• Carbon monoxide (CO) poisoning is a significant public health concern, often resulting from incomplete combustion of carbon-based fuels.
• Central heating systems, particularly those utilizing butane gas, can pose a risk if not properly maintained, leading to potential CO exposure.
• Understanding the cardiac manifestations of CO poisoning is crucial for effective diagnosis and management.

Observation:

• A family of three experienced CO poisoning due to a malfunctioning butane central heating system.
• Clinical observations included elevated carboxyhemoglobin (COHb) levels, ranging from 4.8% to 8.5%.
• Specific cardiac abnormalities noted were disturbances in conduction and ischemic changes on electrocardiograms (ECG), including His bundle blocks and prolonged PQ intervals.

Findings:

• The father exhibited a temporary left bundle branch block and negative T wave on ECG, with elevated urinary amylase.
• The mother presented with an extended PQ interval.
• The son showed a transient incomplete right bundle branch block.
• All patients demonstrated varying levels of COHb, indicating significant CO exposure.

Implications:

• This case highlights the severe cardiac effects of CO poisoning, even at moderate exposure levels.
• Prompt administration of pressurized oxygen therapy proved effective in reversing COHb levels and alleviating symptoms.
• The use of piracetam during treatment warrants further investigation for its potential role in mitigating neurological or cardiac sequelae.