Publications by authors named "Patrick Ohlmann"

Background: The clinical benefit of using ICT for coronary stent optimization remains uncertain in randomized trials, in which a unique ICT was used in most cases.

Aim: To assess the clinical impact of intracoronary techniques (ICT) for stent optimization in high-risk patients.

Methods: The OPTI-XIENCE study is a prospective, observational, multicenter international study including high-risk patients undergoing coronary stenting, in whom any ICT was used for stent optimization at the operator's discretion.

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Background: Acquired von Willebrand factor (vWF) deficiency is a key contributor to bleeding after transcatheter aortic valve replacement (TAVR).

Objective: To evaluate whether assessing primary hemostatic disorder using closure time of adenosine diphosphate (CT-ADP), a marker of vWF dysfunction, enhances bleeding risk stratification in TAVR patients at high bleeding risk (HBR).

Methods: We analyzed 884 patients from a prospective TAVR registry.

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Although aorta atheroma morphology is associated with acute outcomes post-transcatheter aortic valve replacement (TAVR), its association with long-term outcomes post-TAVR remains unknown. This study evaluates the impact of severe aortic atheroma on long-term outcomes following TAVR. We enrolled 977 patients who underwent TAVR between February 2010 and May 2019, with available contrast-enhanced computed tomography data.

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Background: Initially regarded as a benign acute cardiomyopathy, recent insights have shown that takotsubo syndrome (TTS) carries a prognosis comparable to that of acute coronary syndrome, with a notable impact of inflammatory burden. Given the seasonal variation seen in air pollution, inflammation, and coronary events, we investigated whether chronobiology and inflammation contribute to adverse outcomes.

Methods And Results: Between 2008 and 2020, all consecutive TTS patients were retrospectively included in a multicenter registry.

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Transcatheter aortic valve replacement has emerged as a valuable alternative to surgical aortic valve replacement in patients with severe aortic stenosis. Given the expansion of transcatheter aortic valve replacement to lower-risk and younger populations with longer life expectancy, the durability of transcatheter heart valves (THVs) has become an important issue that may impact cardiovascular outcomes. THVs share similarities with surgical valves but have unique features, including a trend to larger effective orifice area and less prosthesis-patient mismatch, interactions with the native valve, and crimping process, that may all potentially influence a THV's life span.

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Background: The prevalence of atrial fibrillation (AF) increases with age. The improvement in ablation techniques has widened the indications, particularly in elderly patients. Data on LA remodeling and low-voltage zone (LVZ) extent in this subgroup are scarce.

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Background: Aortic atherosclerosis can affect the strategy and outcomes of transcatheter aortic valve replacement (TAVR). Limited investigation exists into how aortic atheroma morphology influences outcomes post-TAVR.

Objectives: This study aimed to assess the influence of protruding and ulcerated aortic atheromas on periprocedural ischemic stroke post-TAVR.

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Background And Objectives: Initially described as a benign acute cardiomyopathy, Takotsubo syndrome has been linked to elevated mortality rates. Emerging evidence suggests that unresolved myocardial inflammation may contribute to this adverse prognosis. This study aimed to evaluate the incremental prognostic utility of C-reactive protein (CRP) in conjunction with the InterTAK prognosis score for stratifying long-term mortality in Takotsubo syndrome.

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Aims: Sodium-glucose co-transporter 2 inhibitors (SGLT2i) show a cardioprotective effect in heart failure and myocardial infarction, pathologies often associated with low-grade inflammation. This cross-sectional study aims to investigate whether low-grade inflammation regulates SGLT2 expression and function in human vasculature, heart, and endothelial cells (ECs).

Methods And Results: Human internal thoracic artery (ITA), left ventricle (LV) specimens, and cultured porcine coronary artery ECs were used.

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Article Synopsis
  • - Patients with tachycardia-induced cardiomyopathy (TIC) show better left atrial (LA) health, evidenced by lower LA volume, higher voltage, and fewer low-voltage zones (LVZs) compared to those without TIC.
  • - In a study of 139 persistent atrial fibrillation patients undergoing catheter ablation, those with TIC had less atrial remodeling and a 36-month follow-up showed no significant difference in the rate of atrial tachyarrhythmia (AT) recurrence between TIC and non-TIC groups.
  • - Overall, the findings suggest TIC patients have similar, if not improved, outcomes following ablation procedures, despite possessing a less remodeled atrial substrate.
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Background: CHADS-VASc score-related differences have been reported in atrial fibrotic remodeling and prognosis of atrial fibrillation (AF) patients after ablation. There are currently no data on the efficacy of low voltage zone (LVZ)-guided ablation in persistent AF patients according to CHADS-VASc score. We assessed in a cohort of persistent AF patients the extent of LVZ, the regional distribution of LA voltage and the outcome of LA voltage-guided substrate ablation in addition to PVI according to CHADS-VASc score.

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Background: Out-of-hospital cardiac arrest (OHCA) is a major public health concern and encloses a wide spectrum of causes. The purpose of this study is to assess predictors and rate of survival at hospital discharge and long-term in the setting of OHCA. The secondary endpoint is to compare OHCA-survival outcomes of presumed ischemic versus non ischemic cause.

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Article Synopsis
  • Sodium-glucose co-transporter 2 (SGLT2) inhibitors, like dapagliflozin, may reduce the risk of cardiovascular issues and possibly prevent blood vessel thickening after injury, which is not well understood.
  • In a study with male rats, dapagliflozin reduced neointima thickening by 32% compared to control and also impacted vascular responses without altering certain inflammatory and oxidative gene expressions.
  • The findings suggest that dapagliflozin works by affecting angiotensin and extracellular nucleotide signaling, indicating SGLT2 inhibitors could be a new approach for addressing vascular restenosis.
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  • Atrial fibrillation (AF) is linked to heart issues and involves changes in heart tissue; this study explores how activated factor X (FXa) impacts this process in atrial endothelial cells and human heart tissues.
  • The researchers used cells from pig hearts and human surgical samples, testing for various proteins, gene expressions, and signs of stress and fibrosis in response to FXa.
  • Findings showed that FXa boosts harmful responses like oxidative stress and inflammation in atrial cells while reducing protective factors, and these effects can be blocked by specific inhibitors targeting FXa.
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Background: A delayed and recurrent complete atrioventricular block (CAVB) is a life-threatening complication of transcatheter aortic valve replacement (TAVR). Post-TAVR evaluation may be important in predicting delayed and recurrent CAVB requiring permanent pacemaker implantation (PPI). The impact of new-onset right bundle-branch block (RBBB) after TAVR on PPI remains unknown.

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Background: Obesity is a risk factor for atrial fibrillation (AF). Data regarding left atrial (LA) remodeling in obese patients are scarce. Whether obesity favors AF recurrence after catheter ablation (CA) is still controversial.

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Left ventricular remodeling is an adaptive process initially developed in response to acute myocardial infarction (AMI), but it ends up with negative adverse outcomes such as infarcted wall thinning, ventricular dilation, and cardiac dysfunction. A prolonged excessive inflammatory reaction to cardiomyocytes death and necrosis plays the crucial role in the pathophysiological mechanisms. The pharmacological treatment includes nitroglycerine, β-blockers, ACEi/ARBs, SGLT2i, mineralocorticoid receptor antagonists, and some miscellaneous aspects.

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Background And Aims: The length of stay (LOS) after transcatheter aortic valve implantation (TAVI) remains extremely variable whereas early discharge has been shown to be feasible and safe. The study objective was to evaluate the efficacy and safety of an intervention aimed at reducing LOS after transfemoral TAVI.

Methods: FAST-TAVI II is a prospective, multicentre, cluster, randomized, controlled study including patients with severe symptomatic aortic stenosis, who had transfemoral TAVI.

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Article Synopsis
  • - The study investigated the use of the TAPSE/sPAP ratio, measured by echocardiography, to predict in-hospital major adverse cardiovascular events (MACEs) in patients hospitalized for acute heart failure (AHF) across multiple French hospitals.
  • - A total of 333 patients were included, revealing that a TAPSE/sPAP ratio of less than 0.40 mm/mmHg was independently linked to a higher risk of in-hospital MACEs, which occurred in 15% of patients studied.
  • - The findings suggest that early assessment of TAPSE/sPAP can improve risk stratification in AHF patients and may prompt closer monitoring and intervention strategies.
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Aims: There is a growing body of literature on long-term outcomes post-transcatheter aortic valve replacement (TAVR), but to our knowledge, few research have focused on patients with advanced cardiac dysfunction. This challenging category of patients was excluded from the Partner 3 clinical trial. There are no data to guide the choice of valve type in patients with severely depressed ejection fraction.

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Background: Patients with atrial fibrillation (AF) and a recent (≤ 90 days) percutaneous coronary intervention (PCI) undergoing transcatheter aortic valve implantation (TAVI) are at high bleeding risk due to the addition of oral antiplatelet (OAP) agents on top of oral anticoagulants. Data on outcomes of these patients are needed to optimize antithrombotic treatment.

Methods: This analysis compared annualized clinical event rates in patients with and without a recent PCI enrolled in ENVISAGE-TAVI AF, a prospective, randomized, open-label, adjudicator-masked trial comparing edoxaban and vitamin K antagonists in AF patients after TAVI.

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Heart failure is increasing in terms of prevalence, morbidity, and mortality rates. Clinical trials and studies are focusing on heart failure as it is the destiny end-stage for several cardiovascular disorders. Recently, medical therapy has dramatically progressed with novel classes of medicines providing better quality of life and survival outcomes.

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Background: Mechanical compression of cardiac conduction system by transcatheter heart valves leads to complete atrioventricular block (CAVB) after transcatheter aortic valve replacement (TAVR). Bulging of ventricular septum in the left ventricular outflow tract (LVOT) may be associated with greater compression of conduction system, leading to irreversible CAVB.

Objective: This study aimed to investigate the association of ventricular septal bulging with TAVR-related CAVB and permanent pacemaker implantation (PPI).

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Article Synopsis
  • Transcatheter aortic valve replacement (TAVR) is the preferred treatment for severe aortic stenosis, and a study of 705 patients at Strasbourg University Hospital examined long-term survival rates after the procedure.
  • The study found a 45.8% all-cause mortality rate over an average of 5.4 years, with no significant survival differences based on the type of valve used.
  • Key factors influencing mortality included being aged 90 or older, having diabetes, experiencing post-TAVR stroke, and acute kidney injury, while more than half of the participants survived beyond 5 years post-procedure.
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