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[Right coronary ostial stenosis in homozygotic hypercholesterolemia. Coronarographic and echocardiographic diagnosis]
Insights
Diagnosing right coronary artery ostial stenosis in familial hypercholesterolemia is challenging. Lack of contrast reflux during coronary arteriography is a key diagnostic sign, aiding early detection.
Area of Science:
- Cardiology
- Medical Imaging
- Genetics
Background:
- Familial hypercholesterolemia (FH) is a genetic disorder characterized by high cholesterol levels.
- Coronary artery disease, including ostial stenosis, can be a severe complication of FH.
- Accurate diagnosis of ostial stenosis is crucial for timely intervention.
Observation:
- Two patients with homozygous familial hypercholesterolemia presented with right coronary artery ostial stenosis.
- The stenosis was not visualized directly during selective coronary arteriography in either patient.
- A key diagnostic observation was the lack of contrast medium reflux into the aortic sinus.
Findings:
- The absence of contrast reflux during selective coronary arteriography proved to be a valuable diagnostic sign for ostial stenosis.
- Echocardiography and aortography are recommended prior to coronary arteriography for diagnosing ostial stenosis.
- Diffuse arterial lesions in essential hypercholesterolemia can mask typical stenosis signs.
Implications:
- Recognizing the lack of contrast reflux is vital for diagnosing ostial stenosis, especially when other signs are absent.
- Early identification of ostial stenosis can prevent severe cardiovascular events in patients with hypercholesterolemia.
- This diagnostic approach highlights the importance of considering specific imaging techniques for challenging coronary artery lesions.
Abstract:
Ostial stenosis of the right coronary artery was discovered in 2 patients with homozygous familial hypercholesterolaemia. The lesion was confirmed in one case at post-mortem examination and in the other case by cross-sectional echocardiography. In both patients the stenosis could not be visualized at coronary arteriography when the right coronary vessel was selectively injected, but the lack of reflux of the contrast medium into the aortic sinus proved very useful for the diagnosis. To recognize this sign is important since the other criteria of ostial stenosis are not always present, notably in essential hypercholesterolaemia where post-stenosis dilatation is absent due to diffuse parietal lesions of the arteries. In addition, ostial stenoses are associated with a characteristic stenosis localized to the proximal aorta above the coronary ostia. Owing to the dangers of overlooking ostial stenoses, echocardiography and aortography should be performed before coronary arteriography, and the lack of reflux of the contrast medium should be acknowledged as a diagnostic sign.