Publications by authors named "Quentin Landolff"

Importance: The use of intravascular imaging for calcified plaque characterization and preparation has been advocated over conventional methods to improve percutaneous coronary intervention (PCI) outcomes, but this approach has never been evaluated.

Objective: To determine if optical coherence tomography (OCT) is superior to angiography for calcified lesions PCI guidance.

Design, Setting, And Participants: The CALIPSO (Calcified Lesion Intervention Planning Steered by OCT) trial was a prospective, multicenter, open-label, randomized clinical trial that included patients with stable moderate to severe calcified coronary lesions on coronary angiography scheduled for PCI.

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Background: The rapid and exponential growth in demand for transcatheter aortic valve implantation (TAVI) tends to overwhelm current capacity, leading to prolonged waiting times for TAVI.

Aims: To investigate current waiting times for TAVI, the incidence of death on waiting list for TAVI, clinical characteristics and factors predictive of death before TAVI.

Methods: A total of 1495 patients referred for TAVI in two French centres (TAVI centre, n=790; and non-TAVI centre, n=705) were included for analysis.

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Background: Vascular complications increase morbidity and mortality in transcatheter aortic valve replacement (TAVR). Data involving suture-based percutaneous vascular closure devices (VCDs) have been extensive. Although promising, data regarding the efficacy and safety of the MANTA VCD (Teleflex) are scarce.

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Objectives: The aim of this postmarket clinical study was to assess the safety and efficacy of the latest generation polymer-free sirolimus-eluting stents (PF-SES) in an all-comers population comparing outcomes in stable coronary artery disease (CAD) versus acute coronary syndrome (ACS) in France.

Background: The efficacy and safety of the first-generation PF-SES have already been demonstrated by randomized controlled trials and "all-comers" observational studies.

Methods: For this all-comers observational, prospective, multicenter study, 1456 patients were recruited in 22 French centers.

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Background The interrelationships between left atrial appendage (LAA) dimensions and device following implantation are unknown. We aimed to analyze the impact of Watchman device implantation on LAA dimensions following its percutaneous closure and potential predictors of remodeling. Methods and Results All consecutive LAA closure procedures performed at 2 centers between November 2017 and December 2020 were included in the WATCH-DUAL (Watchman 2.

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Background: Shockwave intravascular lithotripsy (IVL) coronary system is a very useful new technology for severely calcified coronary artery plaques before percutaneous coronary intervention (PCI). The device uses a semi-compliant low-pressure balloon, integrated into a sterile catheter, to deliver by vaporizing fluid an expanding bubble that generates high-pressure ultrasonic energy by waves that create multiplane longitudinal micro-macro fractures in calcified plaques, which facilitate optimal stent placement and expansion, and luminal gain.

Methods: The use of Shockwave IVL coronary system in our cardiac catheterization laboratory (Cath lab) at the "Clinique Saint-Hilaire" in Rouen, France, started in March 2019, with 42 procedures performed since this date: two patients in 2019, two patients in 2020, seven patients in 2021, 23 patients in 2022, and eight patients since the beginning of 2023.

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Coronary calcifications are frequently identified within coronary lesions as their incidence increases with age and cardiovascular risk factors. Their location can be superficial or deep, according to different pathological process. In all cases, the presence of calcifications within the vascular wall predicts poor clinical prognosis and unfavorable evolution after percutaneous revascularization.

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Background: Randomized trials comparing the first-generation absorb bioresorbable vascular scaffold (BVS) (Abbott Vascular, Santa Clara, CA, USA) with a drug-eluting stent showed a moderate but significant increase in the rate of 3-year major adverse cardiac events and scaffold thrombosis, followed by a decrease in adverse events after 3 years.

Aim: The objective of this study was to assess the 5-year outcomes of patients treated with at least one absorb BVS and included in the FRANCE ABSORB registry.

Methods: All patients treated in France with an absorb BVS were prospectively included in a large nationwide multicentre registry.

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An 82-year-old woman who experienced an iatrogenic external iliac vein perforation during a left atrial appendage occlusion procedure was successfully treated by endovascular graft implantation. We report the short- and long-term outcomes of the procedure. ().

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Background: The ACURATE neo™ transcatheter heart valve (Boston Scientific, Marlborough, Massachusetts) is predominantly implanted via femoral access. Transcarotid use of this prothesis has never been reported.

Case Presentation: We present the case of an 89-year-old woman referred to us for a transcatheter aortic valve replacement (TAVR).

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Background: Left atrial appendage occlusion (LAAO) has emerged as a valid alternative to oral anticoagulation therapy for the prevention of systemic embolism in patients with non-valvular atrial fibrillation (NVAF). Microvesicles (MVs) are shed-membrane particles generated during various cellular types activation/apoptosis that carry out diverse biological effects. LAA has been suspected to be a potential source of MVs during AF, but the effects its occlusion on circulating MVs levels are unknown.

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