Journal article
A Phase I proof-of-concept and safety trial of sildenafil to treat cerebral vasospasm following subarachnoid hemorrhage
Journal of neurosurgery, Vol.124(2), pp.318-327
02/2016
DOI: 10.3171/2015.2.JNS142752
PMID: 26314998
Abstract
Studies show that phosphodiesterase-V (PDE-V) inhibition reduces cerebral vasospasm (CVS) and improves outcomes after experimental subarachnoid hemorrhage (SAH). This study was performed to investigate the safety and effect of sildenafil (an FDA-approved PDE-V inhibitor) on angiographic CVS in SAH patients.
A2-phase, prospective, nonrandomized, human trial was implemented. Subarachnoid hemorrhage patients underwent angiography on Day 7 to assess for CVS. Those with CVS were given 10 mg of intravenous sildenafil in the first phase of the study and 30 mg in the second phase. In both, angiography was repeated 30 minutes after infusion. Safety was assessed by monitoring neurological examination findings and vital signs and for the development of adverse reactions. For angiographic assessment, in a blinded fashion, pre- and post-sildenafil images were graded as "improvement" or "no improvement" in CVS. Unblinded measurements were made between pre- and post-sildenafil angiograms.
Twelve patients received sildenafil; 5 patients received 10 mg and 7 received 30 mg. There were no adverse reactions. There was no adverse effect on heart rate or intracranial pressure. Sildenafil resulted in a transient decline in mean arterial pressure, an average of 17% with a return to baseline in an average of 18 minutes. Eight patients (67%) were found to have a positive angiographic response to sildenafil, 3 (60%) in the low-dose group and 5 (71%) in the high-dose group. The largest degree of vessel dilation was an average of 0.8 mm (range 0-2.1 mm). This corresponded to an average percentage increase in vessel diameter of 62% (range 0%-200%).
The results from this Phase I safety and proof-of-concept trial assessing the use of intravenous sildenafil in patients with CVS show that sildenafil is safe and well tolerated in the setting of SAH. Furthermore, the angiographic data suggest that sildenafil has a positive impact on human CVS.
Details
- Title: Subtitle
- A Phase I proof-of-concept and safety trial of sildenafil to treat cerebral vasospasm following subarachnoid hemorrhage
- Creators
- Chad W Washington - Radiology, Washington University School of Medicine, Saint Louis, MissouriColin P Derdeyn - Radiology, Washington University School of Medicine, Saint Louis, MissouriRajat Dhar - Neurology, andEric J Arias - Departments of 1 Neurological SurgeryMichael R Chicoine - Departments of 1 Neurological SurgeryDeWitte T Cross - Radiology, Washington University School of Medicine, Saint Louis, MissouriRalph G Dacey Jr - Departments of 1 Neurological SurgeryByung Hee Han - Departments of 1 Neurological SurgeryChristopher J Moran - Radiology, Washington University School of Medicine, Saint Louis, MissouriKeith M Rich - Radiology, Washington University School of Medicine, Saint Louis, MissouriAnanth K Vellimana - Departments of 1 Neurological SurgeryGregory J Zipfel - Neurology, and
- Resource Type
- Journal article
- Publication Details
- Journal of neurosurgery, Vol.124(2), pp.318-327
- Publisher
- United States
- DOI
- 10.3171/2015.2.JNS142752
- PMID
- 26314998
- ISSN
- 0022-3085
- eISSN
- 1933-0693
- Language
- English
- Date published
- 02/2016
- Academic Unit
- Neurology; Radiology; Iowa Neuroscience Institute; Neurosurgery
- Record Identifier
- 9984020747702771
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