Certain strains of Escherichia coli have been shown to cause gas accumulation in—for example, emphysematous pyelonephritis. This paper describes a patient with intramyocardial air collections resulting from an intramyocardial infection with gas forming E coli.
- myocardial abscess
- Escherichia coli
- CT, computed tomography
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We describe the case of a man with intramyocardial air collections resulting from an intramyocardial infection with gas forming Escherichia coli.
A 55 year old man was admitted to our hospital with de novo diabetes mellitus, dehydration, and high fever. Blood cultures demonstrated Escherichia coli (identified using the VITEK® identification system (bioMérieux Inc, Hazelwood Missouri, USA)) bacteraemia, for which antibiotic treatment with ceftriaxone (2 g/day intravenously) was initiated. Abdominal computed tomographic (CT) scanning revealed multiple splenic abscesses, and E coli was cultured from the aspirates of these abscesses. During rehydration, the patient developed signs of left sided heart failure. A cardiac ultrasound demonstrated left ventricular inferoposterolateral wall motion abnormalities, indicating a recent myocardial infarction. A thoracic CT scan surprisingly revealed intramyocardial gas collections in the left ventricle (fig 1A, B). We hypothesised that these might result from a localised myocardial infection with gas producing E coli, and indeed the E coli that was cultured from the blood was found to be gas forming (fig 1C). Intramyocardial gas gangrene is a rare finding, which has previously been reported in association with infections with gas forming clostridium.1, 2 However, certain strains of E coli are able to produce large amounts of nitrogen, carbon dioxide, and hydrogen in vitro,3, 4 and have been shown to cause gas accumulation in vivo—for example, in emphysematous pyelonephritis.5 Serial thoracic CT scans showed that the intramyocardial air collections decreased in size during antibiotic treatment. Unfortunately, the patient died during an episode of ventricular fibrillation. Postmortem analysis confirmed the inferoposterolateral intramyocardial abscess, which was culture positive for E coli, in a recently infarcted area (fig 1D).
Take home messages
We report a patient with intramyocardial air collections resulting from an intramyocardial infection with gas forming Escherichia coli
The patient died during an episode of ventricular fibrillation
Intramyocardial gas gangrene is rare but has been reported before, usually in association with infections with gas forming clostridium