UHF ECG in LBBB and Response to CRT Prediction

Summary

The main objective of the project is to demonstrate that in patients with heart failure and QRS complex of nonRBBB morphology lasting over 130 ms, UHF-ECG can differentiate patients with trueLBBB from IVCD better than existing approaches based on the assessment of QRS complex morphology and duration from 12-lead ECG. Another goal of the proposed study is to demonstrate that trueLBBB patients will benefit more from CRT using left bundle branch pacing than from CRT using biventricular pacing. The final aim of the project is to demonstrate that the echocardiographic and clinical response in patients with intraventricular conduction disturbance will be dependent on the degree of reduction in ventricular dyssynchrony after CRT.

Eligibility

Inclusion Criteria:

* HF due to ischemic or non-ischemic cardiomyopathy
* known coronary angiography
* NYHA II-IV
* LVEF ≤40%
* non-RBBB QRSd lasting \>130 ms (by automated measurement)
* proximal LBBB proved by an invasive EP study or non-invasive dyssynchrony assessment in case such a method is confirmed to be non-inferior to an invasive EP study during the project

Exclusion Criteria:

* Age ˂18 years
* heart failure from reversible causes
* Moderate to severe aortic stenosis
* pregnancy
* active myocarditis
* hypertrophic cardiomyopathy
* cardiac valve surgery in the last three months
* myocardial infarction, PCI, or CABG in the last three months
* severe valvular disease requiring intervention
* severe atherosclerotic disease of the aorta and/or femoral arteries
* life expectancy ˂1 year
* known medical condition or contraindication causing potential complications for EP study

Conditions5

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