A 2024 comprehensive review found SGB efficacy for PTSD symptoms ranges from 70–83% of treated patients achieving clinically significant positive outcomes across the full range of existing studies
Stellate Ganglion Block in Memorial, Houston TX: Rapid Relief for PTSD, Anxiety, and Trauma
Memorial doesn’t announce itself. The forest canopy along Buffalo Bayou, the mid-century modern homes shaded by decades-old oaks, the six Memorial Villages fiercely protecting their independent character from annexation — this is a community that earned its character through decades of intentional decisions and isn’t inclined to explain itself. It attracts energy executives, surgeons, attorneys, and researchers who chose Memorial specifically because it offers something the rest of Houston can’t quite replicate: genuine quiet at the center of an enormous city. When PTSD, anxiety, or trauma disrupts that quiet from the inside — when the nervous system won’t settle no matter what the environment offers — stellate ganglion block reaches what therapy and medication often cannot. Dr. Ho, board-certified anesthesiologist and former pediatrician, performs this ultrasound-guided procedure at Catalyst Health & Wellness for Memorial residents and patients from the Energy Corridor, Spring Branch, Hedwig Village, Bunker Hill Village, River Oaks, and west central Houston. Three Houston locations, open 5am–9pm, seven days a week.
Memorial One Mechanism Broad Applications
Memorial’s households include a significant number of physicians, researchers, and energy professionals who approach medical decisions analytically — who want to understand the mechanism before committing to the outcome. Here’s what the evidence says when you look at it broadly rather than through a single specialty’s lens.
A 2023 Cureus review by Kirkpatrick, Muench, and Purohit examined stellate ganglion block across six distinct clinical conditions simultaneously: PTSD, long COVID, chronic fatigue syndrome, menopausal hot flashes, anosmia, and ventricular tachyarrhythmias. The connecting thread across all six is not specialty coincidence — it’s a unifying biological mechanism. The authors identify it directly: “reversal of this cascade by local anesthetic injection into the stellate ganglion thereby reduces NGF and sympathetic sprouting subsequently lowering overall norepinephrine levels. This is the unifying theory by which SGB is able to provide resolution for the varied clinical conditions described in this article.”
Elevated nerve growth factor, driving sympathetic nervous system overactivation, producing elevated norepinephrine and its diverse systemic consequences — this is the shared substrate. Trauma produces it through the psychological cascade of PTSD. COVID produces it through neuroinflammation. Menopause produces it through estrogen decline. Ventricular arrhythmia maintains it through cardiac sympathetic overdrive. The stellate ganglion is the anatomical chokepoint where all of these converge — and where one procedure, precisely performed under ultrasound guidance, can interrupt the cascade regardless of which clinical condition drove it.
For Memorial’s analytically minded community, that mechanistic unity isn’t just interesting. It’s the reason to call Catalyst.
What is Stellate Ganglion Block?
The stellate ganglion — the sympathetic nerve cluster formed by the fusion of the inferior cervical and first thoracic ganglia at the base of the neck — governs sympathetic outflow to the head, neck, upper body, and thoracic organs simultaneously. Its connections extend to the hypothalamus, amygdala, insula, and prefrontal cortex — structures governing threat detection, emotional regulation, temperature control, and autonomic homeostasis. When trauma, illness, hormonal shift, or occupational stress drives this node into chronic overactivation, the consequences are felt across every system it governs: the cardiovascular system, the sleep architecture, the emotional regulatory circuits, and the brain’s threat-detection calibration.
Research consistently shows powerful results:
What Our Patients Say
How Stellate Ganglion Block Works
For Memorial's analytical community, the mechanism is worth understanding from first principles rather than simplified summary.
Resetting the Sympathetic Nervous System
The Cureus review's "unifying theory" begins with nerve growth factor. NGF is a protein that regulates sympathetic nervous system development and maintenance — it drives the sprouting of sympathetic nerve fibers and sustains the norepinephrine production those fibers generate. Under normal conditions, NGF is regulated in balance with other growth factors. Under trauma, chronic stress, hormonal disruption, viral neuroinflammation, or sustained occupational exposure, NGF rises and stays elevated — causing sympathetic nerve fibers to proliferate, increasing norepinephrine output to the amygdala and cardiovascular system, and maintaining the body in a state of sympathetic dominance that conventional treatments address downstream rather than at the source.
SGB reaches the source. By temporarily blocking the stellate ganglion's nerve conduction, it interrupts the signal sustaining the NGF elevation and allows the cascade to normalize from the bottom up. The authors of the Cureus review note that this "unifying theory" explains SGB's effectiveness across conditions that appear clinically diverse but share the same biological substrate — including PTSD, long COVID, chronic fatigue syndrome, menopausal hot flashes, and ventricular tachyarrhythmias. For Memorial's Energy Corridor professionals who've seen industrial systems fail through common-cause failure modes, the concept is immediately recognizable: a single root mechanism producing diverse downstream consequences, best addressed at its point of origin.
Reducing Brain Inflammation and Hyperactivity
Beyond the sympathetic reset, SGB produces measurable downstream changes in the amygdala's threat-processing function and the brain's inflammatory state. Animal model research confirms that SGB suppresses hippocampal microglia inflammation — reducing neuroinflammation that contributes to fear memory consolidation and cognitive impairment. VA neuroimaging researchers at Long Beach documented measurable changes in amygdala activity following SGB using functional imaging, correlating those imaging changes with patient-reported symptom improvement.
For Memorial residents managing demanding professional lives that require sustained executive function, rapid judgment under pressure, and the ability to fully disengage from work within a forested community that should provide restoration — the amygdala's chronic hyperactivation carries costs that extend well beyond identifiable PTSD symptoms. SGB's recalibration of that system restores cognitive and emotional resources that the overactivated nervous system has been consuming.
Conditions We Treat with Stellate Ganglion Block in Memorial
SGB addresses the NGF/norepinephrine sympathetic cascade across a range of conditions. At Catalyst Health & Wellness, we offer SGB for:
PTSD
Rapid relief from hyperarousal, hypervigilance, and trauma symptoms
Read MoreAnxiety Disorders
Reducing the physical manifestations of severe anxiety
Read MorePanic Disorder
Calming the fight-or-flight response that drives panic attacks
Read MoreCombat-Related Trauma
Extensively studied in military populations with strong results
Read MoreComplex Trauma
Addressing symptoms from prolonged or repeated traumatic experiences
Read MoreTrauma with Physical Symptoms
Especially effective when anxiety manifests physically
Read MoreSGB integrates powerfully with Catalyst's other treatments. Many Memorial patients combine SGB with ketamine therapy, Spravato, or TMS for comprehensive treatment of complex presentations.
Your Stellate Ganglion Block Journey at Catalyst Health & Wellness
Every step has been designed for precision, transparency, and genuine accessibility for Memorial patients with demanding professional and family schedules.
Step 1: Free Phone Consultation
No cost, no commitment. A clinical team member discusses your complete history — including the full range of symptoms, prior treatments, and what you’re specifically hoping to change. You receive an honest clinical assessment of whether SGB is appropriate for your situation, including if it isn’t.
Step 2: Medical Evaluation
Dr. Ho conducts a thorough pre-procedure evaluation: medical history, current medications, prior procedures, and contraindication review. Every question is answered before any commitment is made.
Step 3: Day of Procedure
Budget two to three hours at the clinic. Arrange transportation — post-procedure driving isn’t advisable. Comfortable clothing with accessible collar area. Normal eating unless instructed otherwise.
Step 4: The SGB Procedure
Dr. Ho uses real-time ultrasound imaging to visualize the stellate ganglion and surrounding anatomy before placing the needle. Skin is numbed first. The anesthetic is delivered under continuous imaging guidance. The injection takes approximately 15–20 minutes. Warmth, slight hoarseness, or a sense of physical release confirm the block is working.
Step 5: Recovery & Observation
One to two hours of monitored recovery follows. Temporary Horner syndrome effects — drooping eyelid, hoarseness, warmth on the treated side — indicate successful stellate ganglion interruption and resolve within hours. Our team remains present throughout.
Step 6: Assessing Response & Follow-Up
Changes typically emerge within hours to days. Our team follows up to track response and determine next steps: a second procedure two weeks later, maintenance scheduling, or complementary treatment options at Catalyst.
The Science Behind Stellate Ganglion Block
A systematic review published in Chronic Stress examined 17 published studies on SGB for psychiatric disorders, finding preliminary evidence supporting feasibility for treating sympathetic nervous system dysregulation conditions. Improvements were observed within 5 minutes and lasted one month or longer.
The 2020 randomized controlled trial in JAMA Psychiatry enrolled 113 active-duty service members across three military hospitals. Two SGBs two weeks apart produced a mean PTSD symptom reduction of −12.6 points versus −6.1 for sham — establishing Level 1B clinical evidence for SGB in PTSD.
The 2023 Cureus review by Kirkpatrick, Muench, and Purohit examined SGB across six distinct clinical conditions — PTSD, long COVID, chronic fatigue syndrome, menopausal hot flashes, anosmia, and ventricular tachyarrhythmias — identifying the NGF/norepinephrine cascade as the “unifying theory” explaining SGB’s effectiveness across all six. The review concludes that “SGB should be considered among patients with refractory symptoms for medical management” in all of these conditions, noting that “case reports to date have shown promising evidence-based results supporting their use as an adjunctive treatment among patients with refractory symptoms to existing treatment algorithms.”
Key research findings:
- A single unifying biological mechanism — elevated NGF driving sympathetic nerve sprouting, sustaining elevated norepinephrine — explains SGB’s effectiveness across PTSD, long COVID, chronic fatigue, menopausal hot flashes, and ventricular arrhythmia
- The 2020 JAMA Psychiatry RCT established Level 1B evidence — the highest clinical standard yet achieved for SGB in PTSD
- 70–83% of treated patients achieve clinically significant positive outcomes; standard PTSD treatment achieves remission in 30–40% — the gap reflects the mechanistic distinction between bottom-up sympathetic reset and top-down symptom management
- Effects appear within minutes to hours and typically last one month or longer; multi-month durability has been confirmed in multiple subsequent studies
Why Choose Catalyst Health & Wellness for Stellate Ganglion Block in Memorial
01
Led by Dr. Ho – Anesthesiology Expertise
The Cureus review specifically notes that SGB's procedural technique "has evolved with technological advances in ultrasonography" — underscoring that ultrasound-guided technique and the anatomical knowledge to use it correctly are the central procedural requirements. Dr. Ho's board certification in anesthesiology places him among the physicians whose core training is built around nerve block anatomy, ultrasound guidance, and the clinical management of local anesthetic procedures in anatomically complex regions. His former career as a pediatrician ensures that clinical precision is paired with genuine attentiveness to how care feels from the patient's perspective.
02
Ultrasound-Guided Precision
The Cureus review is explicit: SGB’s procedural technique has evolved specifically through advances in ultrasonography. Every SGB at Catalyst uses real-time ultrasound imaging — direct visualization of the stellate ganglion and surrounding anatomy before needle placement. This is the standard of care and the only approach Dr. Ho uses.
03
Whole-Person Approach
Memorial patients often present with complex, multi-domain presentations — PTSD alongside occupational stress, anxiety coexisting with cardiovascular concerns, or symptoms that cross the boundaries of any single specialty’s toolkit. From the first call, our team engages with the full picture rather than a single diagnosis. Treatment plans are built around your complete clinical context and coordinated with existing psychiatric, medical, and primary care providers.
04
Extended Hours & Flexible Scheduling
Memorial’s energy executives, surgeons, and attorneys manage demanding professional lives that rarely leave standard weekday clinical windows open. Our 5am to 9pm hours, Monday through Sunday at all three Houston locations, remove that obstacle. The Heights clinic is accessible from Memorial via I-10. Pre-dawn appointments, evening sessions, weekend procedures — all available.
05
Comprehensive Treatment Options
SGB works best as part of a comprehensive approach to trauma recovery. We offer additional treatments that can complement your care:
IV Ketamine Therapy
Rapid relief for PTSD, depression, and anxiety
IM Ketamine Therapy
Intramuscular ketamine for those who prefer this method
Spravato Treatment
FDA-approved nasal esketamine for treatment-resistant depression
TMS Therapy
Non-invasive brain stimulation for depression and OCD
Many patients find that combining SGB with ketamine therapy produces the most comprehensive relief from trauma symptoms.
06
Safe, Comfortable Environment
We understand that people with trauma need to feel safe. Every detail of our treatment environment has been designed with your comfort in mind. Our staff is trained in trauma-informed care, and we move at your pace throughout the entire process. You’ll never be rushed or pressured.
Getting Started with Stellate Ganglion Block in Memorial
Memorial earned its character through decades of deliberate choices — preserving the forest canopy, maintaining independent village governments, building institutions worth protecting. The same deliberate standard belongs in mental health care. If PTSD, anxiety, or trauma has been the domain where that standard hasn’t yet been met — where the approaches tried have helped but not fully resolved the underlying biology — SGB offers a mechanistically coherent, evidence-supported intervention that’s available now, minutes from Memorial Drive.
Call (713) 772-5315 for your free consultation. We’ll discuss your history at the depth you expect, answer every mechanism question specifically, and give you a clear clinical picture of whether SGB makes sense for your situation. No charge, no pressure, complete confidentiality.
The Heights clinic is approximately 15 minutes from Memorial via I-10 East. All three Catalyst locations open 5am to 9pm, every day.
Monday-Sunday, 5am-9pm
Free consultation
Rapid relief
Three Houston locations
Expert anesthesiology care
Commonly Asked Questions
Get Help NowHow quickly does stellate ganglion block work?
Many patients notice improvement within days of the procedure, and some experience relief within minutes. Research shows that effects can appear within 5 minutes and last a month or longer. This rapid onset is one of SGB’s most remarkable features, especially for people who’ve been suffering with trauma symptoms for years.
Is stellate ganglion block safe?
Yes, SGB has been performed safely since the 1920s for various conditions. The procedure has a well-established safety profile with decades of clinical use. Common temporary effects include drooping eyelid, hoarse voice, and warmth on the treated side—all of which resolve within hours. Dr. Ho’s expertise as an anesthesiologist and use of ultrasound guidance ensures the highest safety standards.
Does the procedure hurt?
Most patients experience minimal discomfort. You’ll feel a small pinch from the initial numbing injection, followed by pressure as the medication is administered. The procedure itself takes only minutes, and most patients tolerate it very well. Dr. Ho’s gentle technique and experience help ensure your comfort.
How many SGB treatments will I need?
Many patients experience significant improvement after one or two treatments. Research protocols typically involve two SGBs administered two weeks apart. Some patients benefit from additional treatments over time. We’ll assess your response and recommend a treatment schedule based on your individual results.
How long do the effects last?
Effects typically last one month or longer, with some patients experiencing sustained improvement for many months. A 2025 study found that 96% of patients maintained significant improvement at 6-month follow-up. If symptoms return, the procedure can be repeated.
Can I combine SGB with other treatments?
Yes, many patients find that SGB works best as part of a comprehensive treatment approach. Combining SGB with ketamine therapy, for example, can provide both rapid sympathetic nervous system reset and enhanced neuroplasticity for processing trauma. SGB may also make traditional trauma therapy more tolerable and effective.
Do I need to talk about my trauma during treatment?
No. Unlike trauma-focused therapies that require detailed discussion of traumatic events, SGB works on the biological mechanisms underlying PTSD symptoms. You can share as much or as little as you’re comfortable with. The procedure addresses the physical hyperarousal component of trauma without requiring you to revisit painful memories.
Will insurance cover stellate ganglion block for PTSD?
Coverage varies by insurance plan. SGB for PTSD may be covered by some insurers, particularly when documented as treatment for a recognized condition with failed conventional treatments. We can help verify your benefits and discuss payment options during your consultation.
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