This is especially true of lesions in the posterior cranial fossa, which are more likely to cause dizziness [2]. In 29,510 patients with isolated dizziness presenting to a large academic emergency department, the overall diagnostic yield of CT is very low (<1%) [4]. In multiple studies, CT has demonstrated a high negative predictive value of approximately 90% but a low sensitivity (20%-40%) for detecting a causative etiology [2,3]. CT Temporal Bone With IV Contrast There is no relevant literature regarding the use of CT temporal bone with IV contrast in the evaluation of isolated dizziness. CT Temporal Bone Without and With IV Contrast There is no relevant literature regarding the use of CT temporal bone without and with IV contrast in the evaluation of isolated dizziness. CT Temporal Bone Without IV Contrast There is no relevant literature regarding the use of CT temporal bone without IV contrast in the evaluation of isolated dizziness. CTA Head and Neck With IV Contrast CTA allows for evaluation of the course and luminal caliber of the studied arteries. CTA can also detect luminal filling defects, which may include thrombus, embolus, atherosclerotic plaque, dissection flap, or vascular web. CTA of the head and neck has been shown to have a low overall diagnostic yield of approximately 3% in the setting of isolated dizziness. CTA also did not contribute any additional information over noncontrast head CT in this clinical setting. Overall, CTA in isolated dizziness was shown to have a sensitivity of 14%, specificity of 98%, positive predicative value of 40% and negative predicative value of 92% [3]. MRA Head and Neck With IV Contrast There is no relevant literature regarding the use of MRA head and neck with IV contrast in the evaluation of isolated dizziness. MRA Head and Neck Without and With IV Contrast There is no relevant literature regarding the use of MRA head and neck without and with IV contrast in the evaluation of isolated dizziness.
Dizziness and Ataxia. This is especially true of lesions in the posterior cranial fossa, which are more likely to cause dizziness [2]. In 29,510 patients with isolated dizziness presenting to a large academic emergency department, the overall diagnostic yield of CT is very low (<1%) [4]. In multiple studies, CT has demonstrated a high negative predictive value of approximately 90% but a low sensitivity (20%-40%) for detecting a causative etiology [2,3]. CT Temporal Bone With IV Contrast There is no relevant literature regarding the use of CT temporal bone with IV contrast in the evaluation of isolated dizziness. CT Temporal Bone Without and With IV Contrast There is no relevant literature regarding the use of CT temporal bone without and with IV contrast in the evaluation of isolated dizziness. CT Temporal Bone Without IV Contrast There is no relevant literature regarding the use of CT temporal bone without IV contrast in the evaluation of isolated dizziness. CTA Head and Neck With IV Contrast CTA allows for evaluation of the course and luminal caliber of the studied arteries. CTA can also detect luminal filling defects, which may include thrombus, embolus, atherosclerotic plaque, dissection flap, or vascular web. CTA of the head and neck has been shown to have a low overall diagnostic yield of approximately 3% in the setting of isolated dizziness. CTA also did not contribute any additional information over noncontrast head CT in this clinical setting. Overall, CTA in isolated dizziness was shown to have a sensitivity of 14%, specificity of 98%, positive predicative value of 40% and negative predicative value of 92% [3]. MRA Head and Neck With IV Contrast There is no relevant literature regarding the use of MRA head and neck with IV contrast in the evaluation of isolated dizziness. MRA Head and Neck Without and With IV Contrast There is no relevant literature regarding the use of MRA head and neck without and with IV contrast in the evaluation of isolated dizziness.