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Atrial infarction leading to rupture
Insights
Atrial infarction can cause atrial rupture, a complication often missed, leading to fatal ventricular rupture. Early surgical repair is possible if atrial infarction and its ECG changes are recognized promptly.
Area of Science:
- Cardiology
- Pathology
Background:
- Atrial infarction is a rare but serious cardiac event.
- Necrosis of atrial musculature can lead to chamber rupture.
Observation:
- A case is described where atrial rupture due to infarction was initially overlooked.
- The patient died from a subsequent ventricular rupture.
- Electrocardiogram (ECG) P wave changes were recorded during atrial infarction in the presence of atrioventricular (AV) block.
Findings:
- ECG P wave changes included altered configuration and width, suggesting intra-atrial conduction defects.
- A significant depression of the PR segment (0.04 to 0.07 mV) was observed.
- A novel finding was a convexity in the initial portion of the PR segment in leads showing PR depression.
Implications:
- Prompt recognition of atrial infarction and its associated ECG findings is crucial.
- Timely diagnosis may allow for surgical intervention to prevent fatal outcomes.
- Understanding these specific P wave alterations can improve the diagnosis of atrial infarction.
Abstract:
In the case described, necrosis of the atrial musculature led to rupture of the chamber. This was overlooked for 4 days until the patient died of ventricular rupture. This unusual complication of atrial infarction may be amenable to surgical repair if recognised in time. The high gain recording of P waves in the presence of AV block made it possible to evaluate the P wave changes during atrial infarction: (1) changes in the configuration and width of the P wave, probably resulting from intra-atrial conduction defect; (2) depression of the PR segment (0.04 to 0.07 mV); and (3) a previously unrecorded convexity in the first portion of the PR segment, in the leads in which the depression of the PR segment was observed.