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Cardiac resynchronization therapy (CRT) is a well-established treatment modality for ambulatory patients with heart failure (HF) who have prolonged QRS, left bundle branch block, reduced left ventricular (LV) ejection fraction, and New York Heart Association class II-IV. CRT has been shown to induce reverse LV remodeling and improve HF symptoms and clinical outcomes. About one-third of CRT recipients are considered non-responders. Patient selection, LV lead location, LV lead selection, multipoint pacing, and optimization of the atrioventricular and ventriculo-ventricular intervals were all shown to be associated with a better CRT response rate. Herein, we review the determinants of CRT response.
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http://dx.doi.org/10.19102/icrm.2022.130503 | DOI Listing |
Heart Rhythm
September 2025
Tufts Medicine CardioVascular Center, Division of Cardiology, Boston, MA.
Eur Heart J Case Rep
September 2025
Duke University Medical Center, Division of Cardiology, Box 3182, Durham, NC 27710, USA.
Background: Genetic aetiologies of early-onset arrhythmias and cardiomyopathy (CM) are common, but timely diagnosis requires a high index of suspicion.
Case Summary: An asymptomatic 47-year-old man presented to cardiology clinic for smartwatch low-rate alarms. His brother had exertional syncope and died in his 20s from heart failure.
Heart Rhythm O2
August 2025
Cardiology Department, Pasteur Clinic, Tunis, Tunisia.
Background: The prevalence of cardiac implantable electronic devices (CIEDs) in Tunisia is rising because of increased life expectancy and broader indications. This has led to a higher incidence of complications related to vascular access, device pockets, leads, and patient characteristics.
Objective: We aimed to evaluate the prevalence, types, and predictors of complications occurring within the first year after CIED implantation and to profile the demographic and epidemiologic characteristics of CIED recipients in Tunisia.
Eur J Heart Fail
September 2025
Brazilian Clinical Research Institute (BCRI), São Paulo, Brazil.
Aims: The PARACHUTE-HF trial (NCT04023227) is evaluating the effect of sacubitril/valsartan compared with enalapril on a hierarchical composite of cardiovascular events (cardiovascular death, first heart failure hospitalization), and change in N-terminal pro-B-type natriuretic peptide (NT-proBNP) levels in participants with heart failure and reduced ejection fraction (HFrEF) caused by chronic Chagas cardiomyopathy (CCC). We describe the baseline characteristics of participants in PARACHUTE-HF compared with prior HFrEF trials.
Methods And Results: PARACHUTE-HF, a multicentre, active-controlled, open-label trial, enrolled 922 participants with confirmed CCC, New York Heart Association (NYHA) functional class II-IV, and left ventricular ejection fraction (LVEF) ≤40%.
Cardiovasc Revasc Med
August 2025
Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, DC, USA. Electronic address:
Secondary mitral regurgitation (SMR) remains a prevalent and challenging complication in patients with heart failure (HF), associated with poor prognosis despite optimal guideline-directed medical therapy (GDMT) and cardiac resynchronization therapy. Current American and European guidelines recommend GDMT as first-line therapy, with transcatheter edge-to-edge repair (TEER) reserved for severe symptomatic SMR patients who remain refractory. However, both guidelines preceded the reporting of pivotal randomized controlled trials (RESHAPE-HF2, MATTERHORN, and EFFORT) and emerging evidence in new clinical scenarios.
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