Deans' stroke musings: Susceptibility Vessel Sign in Relation With Time From Onset to Magnetic Resonance Imaging

Changing stroke rehab and research worldwide now.Time is Brain! trillions and trillions of neurons that DIE each day because there are NO effective hyperacute therapies besides tPA(only 12% effective). I have 523 posts on hyperacute therapy, enough for researchers to spend decades proving them out. These are my personal ideas and blog on stroke rehabilitation and stroke research. Do not attempt any of these without checking with your medical provider. Unless you join me in agitating, when you need these therapies they won't be there.

What this blog is for:

My blog is not to help survivors recover, it is to have the 10 million yearly stroke survivors light fires underneath their doctors, stroke hospitals and stroke researchers to get stroke solved. 100% recovery. The stroke medical world is completely failing at that goal, they don't even have it as a goal. Shortly after getting out of the hospital and getting NO information on the process or protocols of stroke rehabilitation and recovery I started searching on the internet and found that no other survivor received useful information. This is an attempt to cover all stroke rehabilitation information that should be readily available to survivors so they can talk with informed knowledge to their medical staff. It lays out what needs to be done to get stroke survivors closer to 100% recovery. It's quite disgusting that this information is not available from every stroke association and doctors group.

Saturday, April 17, 2021

Susceptibility Vessel Sign in Relation With Time From Onset to Magnetic Resonance Imaging

You explain nothing on what this can be used for to get survivors recovered. USELESS.

Susceptibility Vessel Sign in Relation With Time From Onset to Magnetic Resonance Imaging

Sebastien Soize

Pierre-François Manceau

Originally published8 Apr 2021https://doi.org/10.1161/STROKEAHA.120.032198Stroke. ;0:STROKEAHA.120.032198

Abstract

Background and Purpose:

In acute ischemic stroke, the susceptibility vessel sign (SVS) on T2* MR-sequence witnesses the red blood cell content of the clot. Although clot composition strongly depends on its age in vitro, the relationship between SVS and time has not been studied. In this study, we evaluated whether the presence of SVS was related to the time from symptom onset.

Methods:

We retrospectively analyzed our institutional registry of patients with acute stroke between November 2007 and June 2018. We included patients with an ischemic stroke confirmed by diffusion-weighted imaging magnetic resonance imaging within 8 hours from symptom onset caused by M1 or M2 occlusion and with interpretable T2*-weighted images. We compared clinical and imaging variables among SVS+ and SVS− patients. Time from onset was split into tertiles. Independent markers of SVS+ were identified using multivariable logistic regression. The probability of being SVS+ given time from symptoms onset was modeled using Probit regression.

Results:

Among the 608 patients included, 433 (71.2%) were SVS+. The odds of being SVS+ increased with time from symptom onset (P trend=0.005). In the multivariable analysis, factors independently associated with a SVS+ were symptom onset to magnetic resonance imaging ([130–180 min] odds ratio [OR], 1.62 [95% CI, 1.03–2.53]; [>180 min] OR, 3.14 [95% CI, 1.92–5.12]), type of magnetic resonance imaging-scanner (OR, 2.83 [95% CI, 1.82–4.41]), cardioembolic cause (OR, 1.51 [95% CI, 1.02–2.24]), and baseline National Institutes of Health Stroke Scale (OR, 1.05 [95% CI, 1.01–1.08]). The probability of being SVS+ increased with time from symptom onset (P=0.004): around 60% at 1 hour, 70% at 3 hours, 80% at 6 hours, and 90% at 8 hours.