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. Author manuscript; available in PMC: 2013 Nov 1.

Published in final edited form as: Stroke. 2012 Nov;43(11):2884–2891. doi: 10.1161/STROKEAHA.112.663716

A - Modality used to Measure CVR - TCD

B - Modality used to Measure CVR - Nuclear Medicine Scintigraphy

C - Type of Vasodilatory Challenge Used - Acetazolamide

D - Type of Vasodilatory Challenge Used - Variation in Inspired Carbon DioxideFigure 5. Odds ratio and 95% confidence ratio for studies divided by distinguishing features of CVR testing methodology used, including whether TCD (A) or nuclear medicine techniques (B) was the modality of choice and whether acetazolamide challenge (C) or variations in inspired carbon dioxide (D) was the vasodilatory stimulus used. The symbols and abbreviations are as in Figure 2.

A - Modality used to Measure CVR - TCD

B - Modality used to Measure CVR - Nuclear Medicine Scintigraphy

C - Type of Vasodilatory Challenge Used - Acetazolamide

D - Type of Vasodilatory Challenge Used - Variation in Inspired Carbon DioxideFigure 5. Odds ratio and 95% confidence ratio for studies divided by distinguishing features of CVR testing methodology used, including whether TCD (A) or nuclear medicine techniques (B) was the modality of choice and whether acetazolamide challenge (C) or variations in inspired carbon dioxide (D) was the vasodilatory stimulus used. The symbols and abbreviations are as in Figure 2.