A Mechanistic Exploratory Study of AF-induced Cardiac Dysfunction and Symptoms
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- STATUS
- Recruiting
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- End date
- Oct 23, 2024
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- participants needed
- 104
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- sponsor
- Barts & The London NHS Trust
Summary
Although the heart rhythm disorder Atrial Fibrillation (AF) affects 2% of the population, the impact it has on an effected individual can be highly variable. Some people are asymptomatic whilst others can experience debilitating symptoms or heart failure (HF)- weakness of the heart muscle. The reason why this variability exists in unknown and how AF actually drives HF is unclear. HF can also be caused by many other reasons and it can be difficult to identify those patients with HF caused by AF versus patients with AF but their HF is due to a different reason. This is important as it would help us to identify those patients most likely to improve their heart function after the treatment of AF and thus gain more from invasive treatments like AF catheter ablation; which is effective at restoring normal heart rhythm but has some risks attached.
The investigators suspect the characteristics of the AF, such as how irregularly it makes the heartbeat, can be used to predict who will respond better. Studies of heart cells in the lab as well as animal models have suggested this characteristic may be the cause of AF-induced heart muscle weakness and reduce cardiac output, making it a potential predictor that can be measured. Other potential predictors will be measured during pre-procedural scans and tests too. The investigators will also explore whether there are predictors of which patients gain the most symptomatic benefit and gain insight into why some people develop symptoms of AF, whereas others do not.
By studying the structural and functional sequelae of catheter ablation in patients with HF the investigators hope to better understand the relationship between the two diseases.
Details
| Condition | Atrial Fibrillation, Heart Failure |
|---|---|
| Treatment | Cardiac MRI, stress echocardiography, Holter monitoring, Patient questionnaires |
| Clinical Study Identifier | NCT04987723 |
| Sponsor | Barts & The London NHS Trust |
| Last Modified on | 23 March 2022 |
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