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Abnormal left ventricular catheter motion: an ancillary angiographic sign of left atrial myxoma
Insights
Left atrial myxoma causes paradoxical left ventricular catheter motion, moving posterior during systole and anterior during diastole. This finding aids in diagnosing prolapsing left atrial tumors.
Area of Science:
- Cardiology
- Medical Imaging
Background:
- Understanding normal left ventricular catheter movement is crucial for interpreting diagnostic imaging.
- Left atrial myxomas can alter intracardiac dynamics, potentially affecting catheter behavior.
Observation:
- Normal left ventricular catheter motion synchronizes with the aortic root: anterior in systole, posterior in diastole.
- Prolapsing left atrial myxoma disrupts this pattern, inducing paradoxical catheter motion: posterior in systole, anterior in diastole.
Findings:
- Paradoxical motion was observed in all five patients with prolapsing left atrial myxoma.
- Six false positives occurred in 61 controls, often with minor motion abnormalities and improper catheter positioning.
Implications:
- Paradoxical left ventricular catheter motion is a valuable ancillary angiographic sign for diagnosing prolapsing left atrial tumors.
- Accurate catheter placement is essential to avoid false positive interpretations.
Abstract:
The normal motion of a left ventricular catheter parallels that of the aortic root; it moves anterior during systole and posterior during diastole. In contrast, a prolapsing left atrial myxoma causes paradoxical motion of the catheter; posterior during systole and anterior during diastole. Paradoxical motion was found in each of five cases of prolapsing left atrial myxoma (no false negatives), and in six out of 61 controls (six false positives). In the false positive cases, the catheter was not positioned on the ventricular floor and usually only minor degrees of abnormal motion were present. Paradoxical motion of the left ventricular catheter is an ancillary angiographic finding in prolapsing left atrial tumor.