Q:  What is the mean level of Troponin I elevation in Subarachnoid Hemorrhage (SAH)?

Answer:   0.93

At least one study showed that the mean troponin level in subarachnoid hemorrhage was 0.93 (range, 0.01-25.8 ng/mL). But, Troponin I elevation after SAH is not an independent predictor of in-hospital mortality. 

Reference:

Gupte M, John S, Prabhakaran S, Lee VH. - Troponin elevation in subarachnoid hemorrhage does not impact in-hospital mortality.- Neurocrit Care. 2013 Jun;18(3):368-73.