What Is ECT and How Does It Compare to Ketamine?
Electroconvulsive therapy, or ECT, has been used since the 1930s to treat severe depression. It works by passing brief electrical currents through the brain while the patient is under general anesthesia, inducing a controlled seizure. Researchers believe this triggers changes in brain chemistry that can relieve depressive symptoms.
For decades, ECT was considered the most effective option for patients whose depression did not respond to medications. It remains a well-studied, evidence-based treatment.
IV ketamine works through a different mechanism entirely. Rather than inducing a seizure, ketamine modulates NMDA receptors and promotes neuroplasticity, helping the brain form new neural connections. It is administered as an intravenous infusion over 40 to 60 minutes, without general anesthesia.
Until recently, there was limited head-to-head data comparing the two. That changed with the publication of a major clinical trial in the New England Journal of Medicine.
What Did the NEJM Study Find?
The study, published in the New England Journal of Medicine, was one of the first large-scale trials to directly compare IV ketamine with ECT for treatment-resistant depression. The results were notable.
- IV ketamine achieved a 55.4% response rate
- ECT achieved a 41.2% response rate
- Ketamine was established as non-inferior to ECT, meaning it performed at least as well
- Numerically, ketamine outperformed ECT, though the study was designed to test non-inferiority rather than superiority
These findings suggest that IV ketamine is a viable alternative to electroconvulsive therapy for treatment-resistant depression, with a different side effect profile that many patients may find more acceptable. — New England Journal of Medicine
This study matters because ECT has long been the benchmark for treatment-resistant cases. Establishing that ketamine performs comparably—and potentially better—gives patients and providers another strong option to consider.
How Do the Side Effects Compare?
Side effects are one of the most important differences between these two treatments, and they often influence which option patients prefer.
ECT side effects include:
- Memory difficulties. This is the most commonly discussed concern. ECT can cause temporary and sometimes longer-lasting gaps in memory, particularly around events close to the treatment period. Some patients report difficulty forming new memories for weeks after a course of ECT.
- Confusion. Post-treatment confusion is common and can last for minutes to hours after each session.
- Physical effects. Headaches, muscle soreness, nausea, and jaw pain are reported by some patients. These are generally related to the anesthesia and the induced seizure.
- Anesthesia risks. Because ECT requires general anesthesia for each session, it carries the standard risks associated with repeated anesthesia exposure.
IV ketamine side effects are typically mild and short-lived:
- Dissociation. Many patients experience a temporary feeling of detachment or altered perception during the infusion. This typically resolves within 30 to 60 minutes after the session ends.
- Nausea. Mild nausea occurs in some patients and can be managed with medication.
- Temporary blood pressure elevation. Blood pressure is monitored throughout each session. At Music City Ketamine, Marla Peterson, CRNA, monitors your vitals continuously with the same equipment and training used in operating rooms.
- No memory effects. Ketamine does not carry the risk of memory impairment associated with ECT.
For many patients, the absence of memory-related side effects is a significant factor in choosing ketamine over ECT.
What Is the Treatment Experience Like?
The practical differences between a ketamine session and an ECT session are substantial.
An ECT session involves arriving at a hospital or specialized facility, receiving general anesthesia, undergoing the procedure, and recovering in a post-anesthesia care area. Most patients need someone to drive them home and plan to rest for the remainder of the day. A typical initial course involves 6 to 12 sessions, usually three times per week.
A ketamine session at Music City Ketamine is a different experience. You settle into a private treatment room in our Cool Springs clinic. Walter White or Wilma, our therapy dogs, may stop by to say hello. The infusion lasts 40 to 60 minutes for mental wellness, during which Marla monitors you directly. Most patients are ready to leave within 30 to 60 minutes after the infusion ends. You will need a driver, but many patients return to their normal routine the next day.
A standard initial protocol involves six sessions over two to three weeks.
Ketamine vs ECT: Side-by-Side Comparison
| Factor | IV Ketamine | ECT |
|---|---|---|
| Response rate (NEJM) | 55.4% | 41.2% |
| Anesthesia required | No | Yes (general) |
| Memory side effects | None reported | Common (temporary to lasting) |
| Session duration | 40–60 minutes | Variable (plus recovery) |
| Recovery time | 30–60 min post-infusion | Rest of the day |
| Setting | Outpatient clinic | Hospital or specialized facility |
| Typical initial course | 6 sessions over 2–3 weeks | 6–12 sessions, 3x/week |
| Insurance coverage | Typically not covered | Usually covered |
| Cost at MCK | $475 per session | N/A (not offered) |
| Mechanism | NMDA modulation, neuroplasticity | Induced seizure, neurochemical changes |
Who Might Still Benefit from ECT?
We want to be straightforward: ECT is still a valuable treatment. There are situations where it may be the more appropriate choice.
- Severe, acute depression with psychotic features. ECT has strong evidence for depression accompanied by psychosis, where ketamine data is more limited.
- Catatonia. ECT remains a first-line treatment for catatonic states.
- Patients who have responded well to ECT previously. If ECT has worked for you before, it may be the right choice again.
- Situations where rapid stabilization is critical. In some inpatient settings, ECT may be the fastest path to stabilization for patients in crisis.
Our position is not that ketamine replaces ECT for everyone. It is that patients now have a well-studied alternative that may work as well or better, with fewer side effects, for many forms of treatment-resistant depression.
Can You Try Ketamine Before ECT?
Yes, and many providers now recommend this approach. Given the NEJM study findings and ketamine's more favorable side effect profile, trying ketamine first is a reasonable clinical path for most patients with treatment-resistant depression.
If ketamine produces meaningful improvement, you may not need ECT at all. If ketamine does not provide adequate relief, ECT remains available as a next step. The two treatments are not mutually exclusive—they can be part of a broader treatment strategy.
At Music City Ketamine, we encourage patients to discuss both options with their existing providers. We are happy to coordinate with your psychiatrist, therapist, or primary care physician to ensure your treatment plan is cohesive.
What Does This Mean for Patients in Middle Tennessee?
If you are considering ECT for treatment-resistant depression, you now have strong evidence that IV ketamine is a comparable alternative worth exploring first. The NEJM study gives both patients and referring providers confidence that ketamine is not just a promising idea—it has been directly compared to the historical gold standard and performed well.
At Music City Ketamine, every session is administered by Marla Peterson, CRNA, with over 20 years of anesthesia experience. You receive one-on-one care in a private setting, with anesthesia-level monitoring, in our Cool Springs location just off I-65 in Franklin.
A consultation is the best way to determine whether ketamine is appropriate for your situation. There is no pressure and no obligation. We will review your treatment history, discuss what the research shows, and help you make an informed decision.