The systemic effects of spinal anesthesia is not fully known. Our aim of this study is to assess whether there is a difference in hemodynamic effects if the spinal dose is given fast (15s) or slow (90s) in elderly patients with acute hip fracture (AHF). Ninety (n=90) patients with AHF planned for surgery within 72h at our hospital will be enrolled in the study and randomly devided into two groups. The patients will receive one predetermined dose of spinal anesthesia followed by an advanced minimally-invasive hemodynamic monitoring through an arterial line using FloTrac-system. The hemodynamic parameters will be conducted 10 minutes prior to the spinal anaesthesia and 30 minutes after the spinal block is given. Hypotension was defined as a fall in MAP \> 30 % or a MAP \<65mmHg.
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Mean arterial pressure (MAP)
Timeframe: 10 minutes before and 45 minutes after the intrathecal dose is given