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The present observational prospective study aims at identifying echocardiographic parameters (based on the Left Bundle Branch Block (LBBB)-like contraction of the left ventricle (LV) ascertained using new methods of echocardiography including speckle tracking strain) that are linked to Cardiac Resynchronization Therapy (CRT) response and a better outcome following CRT
The Cardiac Resynchronization Therapy (CRT) reduces mortality of patients with heart failure and reduced LV ejection fraction. The clinical benefit of CRT is mediated by LV reverse remodelling (decrease in LV end-systolic volume over time). However, 30 to 50 % of these patients will not experience LV reverse remodelling following CRT.
Classical parameters of dyssynchrony obtained by conventional methods of echocardiography (including doppler tissue imaging) have a limited value in predicting CRT response. Meanwhile, patients with a Left Bundle Branch Block (LBBB) on the electrocardiogram experience more frequently LV reverse remodelling than those without a LBBB.
LBBB is responsible for specific LV contractile abnormalities that can be identified by speckle tracking strain echocardiography (early septal contraction, stretching of late contraction of the postero-lateral wall). The predictive value of these abnormalities remains to be studied.
Thus, it has been hypothesised that these LBBB-related contractile abnormalities may be independent predictors of LV reverse remodelling and outcome following CRT.
The present observational prospective study aims at identifying echocardiographic parameters (based on the LBBB-like contraction of the LV ascertained using new methods of echocardiography including speckle tracking strain) that are linked to CRT response and a better outcome following CRT.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Patients with heart failure and CRT | Heart failure with left ventricular ejection fraction less than 35 % treated with CRT |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Echocardiography | Other |
|
| Measure | Description | Time Frame |
|---|---|---|
| Changes in left ventricular end-systolic volume measured by echocardiography | 9 months after implantation |
| Measure | Description | Time Frame |
|---|---|---|
| Death rate | 2, 4, 6, 8 and 10 years after implantation | |
| re-hospitalisation rate | 2, 4, 6, 8 and 10 years after implantation | |
| Changes in left ventricular ejection fraction measured by echocardiography |
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Inclusion Criteria:
Exclusion Criteria:
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Patient with LV systolic dysfunction and QRS duration > 120 ms receiving CRT at GHICL.
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Amélie Lansiaux, MD, PhD | Contact | 00 33 3 20 52 69 | lansiaux.amelie@ghicl.net |
| Name | Affiliation | Role |
|---|---|---|
| Sylvestre Maréchaux, MD, PhD | Hospital of Lille Catholic University (GHICL) | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Hospitals of Lille Catholic University (GHICL) | Recruiting | Lomme | 59462 | France |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 37038875 | Derived | Layec J, Decroocq M, Delelis F, Appert L, Guyomar Y, Riolet C, Dumortier H, Mailliet A, Tribouilloy C, Marechaux S, Menet A. Dyssynchrony and Response to Cardiac Resynchronization Therapy in Heart Failure Patients With Unfavorable Electrical Characteristics. JACC Cardiovasc Imaging. 2023 Jul;16(7):873-884. doi: 10.1016/j.jcmg.2022.12.023. Epub 2023 Mar 8. | |
| 30595180 |
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| ID | Term |
|---|---|
| D006333 | Heart Failure |
| ID | Term |
|---|---|
| D006331 | Heart Diseases |
| D002318 | Cardiovascular Diseases |
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| 9 months after implantation |
| Changes in left ventricular end-diastolic volume measured by echocardiography | 9 months after implantation |
| Changes in left ventricular longitudinal strain measured by echocardiography | 9 months after implantation |
| Appert L, Menet A, Altes A, Ennezat PV, Bardet-Bouchery H, Binda C, Guyomar Y, Delelis F, Castel AL, Le Goffic C, Guerbaai RA, Graux P, Tribouilloy C, Marechaux S. Clinical Significance of Electromechanical Dyssynchrony and QRS Narrowing in Patients With Heart Failure Receiving Cardiac Resynchronization Therapy. Can J Cardiol. 2019 Jan;35(1):27-34. doi: 10.1016/j.cjca.2018.10.019. Epub 2018 Nov 14. |