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Patients with CHF benefit from heart rate lowering, and the investigators have previously demonstrated that this does not adversely affect exercise tolerance. In a pacemaker population we also have shown that preventing heart rate lowering is detrimental in terms of symptoms and prognosis.
The aim of the study is to therefore to establish whether heart rate limitation in patients with heart failure has a negative impact on exercise capacity. If the investigators establish that this is not the case, physicians will be able to confidently prescribe heart rate lowering agents, and programme pacemakers to allow bradycardia without the concern that there will be detrimental effects of symptom.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| ivabradine | Active Comparator | Exercise with ivabradine |
|
| Placebo | Placebo Comparator | Exercise with placebo |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| ivabradine | Drug |
| ||
| Placebo |
| Measure | Description | Time Frame |
|---|---|---|
| Examining the effects of iatrogenic CI on exercise capacity | Each subject will undergo a full echocardiographic examination.We will assess LV systolic and diastolic function variables, mitral regurgitation, and pulmonary artery pressure. | 24 months |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Klaus Witte, FRCP, MD | Contact | 01133926642 | k.k.witte@leeds.ac.uk |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Leeds Teaching Hospitals NHS Trust | Recruiting | Leeds | LS2 9JT | United Kingdom |
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| ID | Term |
|---|---|
| D000077550 | Ivabradine |
| D015444 | Exercise |
| ID | Term |
|---|---|
| D001552 | Benzazepines |
| D006574 | Heterocyclic Compounds, 2-Ring |
| D000072471 | Heterocyclic Compounds, Fused-Ring |
| D006571 | Heterocyclic Compounds |
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|
| Exercise | Other |
|
| D009043 | Motor Activity |
| D009068 | Movement |
| D009142 | Musculoskeletal Physiological Phenomena |
| D055687 | Musculoskeletal and Neural Physiological Phenomena |