NCT05524077Active, not recruiting
Catheter Ablation Versus Anti-arrhythmic Drugs for Ventricular Tachycardia
Catheter Ablation Versus Anti-arrhythmic Drugs for Ventricular Tachycardia (CAAD-VT): A Randomised Trial
Source: ClinicalTrials.gov · Last updated 16 Mar 2026
Brief summary (registry, in English)
Sudden cardiac death (SCD) due to recurrent ventricular tachycardia (VT) is an important clinical sequela in patients with structural heart disease. VT generally occurs as a result of electrical re-entry in the presence of arrhythmogenic substrate (scar). Scar tissue forms due to an ischemic cardiomyopathy (ICM) from prior coronary obstructive disease or a non-ischemic cardiomyopathy (NICM) from an inflammatory or genetic disease. AADs can reduce VT recurrence, but have significant limitations in treatment of VT. For example, amiodarone has high rates of side effects/toxicities and a finite effective usage before recurrence. ICDs prevent cardiac arrest and sudden death from VT, but do not stop VT occurring. Recurrent VT and ICD therapies decrease QOL, increase hospital visits, mortality, morbidity and risk of death. Improvement in techniques for mapping and ablation of VT have made CA an alternative. Currently, there is limited evidence to guide clinicians either toward AAD therapy or CA in patients with NICM. This data shows significant benefit of CA over medical therapy in terms of VT free survival, survival free of VT storm and VT burden. Observational studies suggest that CA is effective in eliminating VT in NICM patients who have failed AADs, resulting in reduction of VT burden and AAD use over long term follow up. Furthermore, there is limited data on the efficacy of CA in early ICM with VT, or advanced ICM with VT. RCT data is almost exclusively on patients with modest ICM with VT, and this is not representative of the real-world scenario of patients with structural heart disease presenting with VT. Therefore the primary objective is to determine in all patients with structural heart disease and spontaneous or inducible VT, if catheter ablation compared to standard medical therapy with anti-arrhythmic drugs results in a reduction of a composite endpoint of recurrent VT, VT storm and death at a median follow up of 18 months.
- Status (registry)
- Active, not recruiting
- Study type
- Interventional
- Enrollment
- 162 (estimated)
- First submitted
- 24 Aug 2022
- Start date
- 8 Jul 2020
- Primary completion date
- 30 Jun 2026
- Lead sponsor
- Western Sydney Local Health District
- Diseases
- Hypertrophic cardiomyopathy
- NCT number
- NCT05524077
What you commit to
- Study type: Interventional
- Planned participants: 162
- From 8 Jul 2020 to the primary completion date, 30 Jun 2026
- 9 sites in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Have a concomitant illness, physical impairment or mental condition which in the opinion of the study team/ primary care physician could interfere with the conduct of the study including outcome assessments;
- Known prior diagnosis of no structural heart disease, or idiopathic ventricular arrhythmia.
Other illness
- Medical illness with an anticipated life expectancy \<3 months;
Lab values
- Known channelopathy such as long QT, short QT, Brugada syndrome, catecholaminergic polymorphic VT;
Other
- Patients will be excluded if they are:
- Unable or unwilling to provide informed consent or patients physician feels there is not significant equipoise to justify randomisation;
- Women who are pregnant, breast feeding;
- Unable to complete study procedures or unwilling to be followed up;
Who the study is looking for
- Patients will be eligible for inclusion if they have:
- ≥1 prior episode of sustained VT in the prior 6 months;
- Spontaneous VT: ≥1 episode of monomorphic VT treated by anti-tachycardia pacing (ATP) and/or internal shock by an ICD; lasting ≥30 seconds in the absence of intra-cardiac device therapy that could either be self-terminating or require reversion by pharmacological therapy or external cardioversion;
- Spontaneous VT: ≥1 episode of sustained spontaneous monomorphic VT lasting ≥30 seconds documented on Holter, ECG, Loop recorder or other cardiac monitoring device that could either be self-terminating or require reversion by pharmacological therapy or external cardioversion;
- Inducible VT: with syncope or palpitations - inducible VT defined as sustained monomorphic VT of CL ≥200 ms lasting for ≥10 s during a cardiac electrophysiology study (note with 4 extrastimuli with or without provocation with isoprenaline);
- Already a recipient of an implanted cardiac device such as a pacemaker, defibrillator or a cardiac resynchronisation therapy device and/or is indicated to receive one given a new diagnosis of structural heart disease, based on current guideline recommendations;
- Aged ≥18 years.
Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers
Sites (9)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Royal Adelaide Hospital Coordinator of this site? Confirm its status | Adelaide | Australia | Unknown status |
| Royal Prince Alfred Hospital Coordinator of this site? Confirm its status | Camperdown | Australia | Unknown status |
| The Prince Charles Hospital Coordinator of this site? Confirm its status | Chermside | Australia | Unknown status |
| Nepean Hospital Coordinator of this site? Confirm its status | Kingswood | Australia | Unknown status |
| The Alfred Hospital Coordinator of this site? Confirm its status | Melbourne | Australia | Unknown status |
| John Hunter Hospital Coordinator of this site? Confirm its status | New Lambton Heights | Australia | Unknown status |
| Royal North Shore Hospital Coordinator of this site? Confirm its status | Saint Leonards | Australia | Unknown status |
| Gold Coast University Hospital Coordinator of this site? Confirm its status | Southport | Australia | Unknown status |
| Westmead Hospital Coordinator of this site? Confirm its status | Westmead | Australia | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.