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At least 433 records · Page 24Linked to original sources
PubMed1998

Sonographic detection of haemodynamic changes in a case of vertebrobasilar insufficiency.

We present a diagnostically challenging case of vertebrobasilar insufficiency caused by head rotation. The patient was a 58-year-old man complaining of dizziness and faintness with head rotation to the left. Vertebral arteriography with the head turned to the left revealed mechanical compression of the right vertebral artery at the occipitoatlantal joints and an occluded left vertebral artery. Duplex sonography demonstrated disappearance of the end-diastolic flow signal in the right vertebral artery on head rotation, paralleling the appearance of symptoms. Decompression of the vertebral artery by transversectomy of the atlas and hemilaminectomy of the axis completely relieved the symptoms and the Doppler flow signal pattern of the vertebral artery returned to normal: End-diastolic flow in the right vertebral artery did not disappear even when the head was rotated to the left.

Cerebrovascular Circulation↗
PubMed1998

[New methods for measuring atlanto-axial vertical subluxation in rheumatoid arthritis by MR imaging].

We proposed two new methods of measuring atlanto-axial vertical dislocation in rheumatoid arthritis by MR imaging. One is the distance from the subdental synchondrosis of the axis to the diameter of the ring of the atlas. The other is the distance from the midpoint of the anteroposterior ends of the inferior margin of the axis to the diameter of the ring of the atlas. Values were also determined by the Ranawat method and the Redlund-Johnell method. There was good correlation between values determined by the new methods and those determined by the Ranawat method and Redlund-Johnell method.

Adolescent↗
PubMed1988

Atlas fractures: treatment and long-term results.

Fractures of the first cervical vertebra (C1) represent approximately 7% of all acute cervical spine fractures. Frequently, the atlas will be fractured in combination with the axis (44% of cases). Treatment of isolated C1 fractures should be governed by the rules of Spence. The treatment of combination C1-C2 fractures is dictated by the type and severity of the C2 fracture. Experience with 57 cases of acute traumatic atlas fractures are reviewed. The long-term outcome from an atlas fracture is good (median follow-up, 40 months).

Adolescent↗