Publications by authors named "Davlouros P"

Approximately 50% of individuals eligible for transcatheter aortic valve implantation (TAVI) have coronary artery disease (CAD). The influence of CAD, both its prevalence and severity, on post-TAVI clinical results has yielded conflicting findings. Recent research has shown positive results for the use of computed tomography angiography and functional percutaneous evaluation of coronary lesions in the pre-TAVI assessment, besides the classic coronary angiography.

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Esophageal injury is a serious complication following atrial fibrillation catheter ablation procedures. It may manifest as atrio-esophageal fistula, pericardio-esophageal fistula (PEF), or restricted perforation, with high mortality rate if left unoperated. Chest computed tomography with intravenous contrast is the mainstay of diagnosis; however, a definite imaging diagnosis is often delayed and may worsen patient outcomes.

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Background: A considerable number of symptomatic patients leave the cardiac catheterization lab without a definitive diagnosis for their symptoms because no epicardial stenoses are found. The significance of disorders of coronary microvasculature and vasomotion as the cause of symptoms and signs of ischemia has only recently been appreciated. Today we have a wide spectrum of invasive coronary physiology tools but little is known about when and how these tools are used in clinical practice.

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Background: Distal radial artery access (DRA) has been emerged as an alternative for conventional transradial arterial access. While palpation of radial artery is mandatory prior coronary angiography, it remains unknown the clinical impact of palpation in DRA success. Aim of our study is to explore whether the palpability of distal radial artery is linked with higher rates of successful arterial access.

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Background And Aim: Diabetes has been shown in last decades to be associated with a significantly higher mortality among patients with ST-segment elevation myocardial infarction (STEMI) treated with primary PCI (PPCI). Therefore, the aim of current study was to evaluate the impact of diabetes on times delays, reperfusion and mortality in a contemporary STEMI population undergoing PPCI, including treatment during the COVID pandemic.

Methods And Results: The ISACS-STEMI COVID-19 is a large-scale retrospective multicenter registry involving PPCI centers from Europe, Latin America, South-East Asia and North-Africa, including patients treated from 1st of March until June 30, 2019 and 2020.

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Article Synopsis
  • * Results show that COVID-19 patients had a significantly lower LnRHI two months after discharge compared to matched controls, indicating persistent endothelial dysfunction.
  • * The study found that a high percentage of COVID-19 patients exhibited endothelial dysfunction during hospitalization and at six months later, but there were no significant differences in thrombotic events, cardiovascular complications, or mortality between the two groups.
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  • * Effective lipid-lowering therapies, like statins and PCSK9 inhibitors, have been shown to improve clinical outcomes by reducing plaque volume and enhancing its stability.
  • * There's a growing need for new treatments that not only lower lipid levels but also target inflammation to stabilize vulnerable plaques and prevent adverse cardiac events.
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  • Ultrasound-guided axillary (USAX) vein puncture is a newer technique for accessing veins during cardiac device implantation but is underused due to a lack of familiarity among operators.
  • A study compared USAX with traditional cephalic vein access in 114 patients, focusing on successful lead placement and procedure-related metrics.
  • Results showed USAX had a higher success rate, shorter procedure time, and less pain compared to the cephalic method, with similar complication rates overall.
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Patients suffering from chronic kidney disease (CKD) have higher ischemic and bleeding risk compared with patients with normal renal function. The aim of our systematic review and meta-analysis is to compare shortened (≤3 months) dual antiplatelet therapy (DAPT) with longer DAPT in patients with CKD undergoing percutaneous coronary interventions. We systematically screened three major databases (Medline, Cochrane Central Register of Controlled Trials, and Scopus) searching for randomized-controlled trials or subanalyses of them, which compared shortened (S-DAPT) to longer (L-DAPT) regimens of DAPT in patients with CKD.

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Background: Hypertension is the most prevalent cardiovascular risk factor, with several detrimental effects on the cardiovascular system. Contrasting results have been reported so far on its prognostic role in patients admitted for ST-segment elevation myocardial infarction (STEMI). Therefore, we investigated the impact of hypertension on short-term mortality in a large multicenter contemporary registry of STEMI patients, including patients treated during COVID-19 pandemic.

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Background: Coronary computed tomography angiography (CCTA) in patients with post-coronary artery bypass graft (CABG) has a high diagnostic accuracy for visualization of grafts. Invasive coronary angiography (ICA) in patients with CABG is associated with increased procedural time, contrast agent administration, radiation exposure, and complications, compared with non-CABG patients. The aim of this multicenter, randomized controlled trial was to compare the strategy of CCTA-guided ICA versus classic ICA in patients with prior CABG.

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Acute coronary syndrome due to a non-atherosclerotic, non-traumatic, or iatrogenic-induced spontaneous coronary artery dissection (SCAD) is a rare clinical condition that affects mostly young women of reproductive age. In this case, we present a 36-week-pregnant, 35-year-old G2P1 woman, with no previous medical history, who was admitted to our hospital with premature pre-labor contractions. During her hospitalization, she underwent a coronary artery percutaneous angiography revealing SCAD of the three coronary vessels, after an episode of acute-onset chest pain, tachypnea, EKG alterations, cardiac enzyme elevation, and bilateral pleural effusions.

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Background: Biventricular pacing (BVP) is recommended for patients with heart failure (HF) who require cardiac resynchronization therapy (CRT). Left bundle branch area pacing (LBBAP) is a novel pacing strategy that appears to ensure better electrical and mechanical synchrony in these patients. Our aim was to systematically review and meta-analyze the existing evidence regarding the clinical outcomes of LBBAP-CRT compared with BVP-CRT.

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The emergence of percutaneous treatment options provides novel therapeutic alternatives for older and feeble patients who are at high risk for any surgical procedure. The purpose of our review was to offer an up-to-date analysis of the rapidly expanding field of percutaneous technologies for mitral, tricuspid, and pulmonary procedures. Edge-to-edge repair is an established treatment for secondary mitral regurgitation (MR), while transcatheter mitral valve replacement is a potential and expanding option for managing both secondary and primary MR.

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Article Synopsis
  • - This study introduces a new method, FFR2D, for quickly and accurately calculating fractional flow reserve using routine 2D coronary angiograms, comparing its effectiveness to the traditional pressure wire measurement in assessing coronary artery stenosis.
  • - Conducted with 88 patients, the results showed that FFR2D had a strong correlation with the invasive FFR, achieving a diagnostic accuracy of 90.9%, with key metrics including 85.7% sensitivity and 93.3% specificity for identifying critical artery blockages.
  • - FFR2D outperformed the standard 50% diameter stenosis measurement in predictive ability, demonstrating a significantly higher area under the ROC curve, indicating its potential as a more reliable tool
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Background: Gut-derived bacterial and endotoxin translocation induce systemic inflammation, which exerts a pivotal pathogenetic role in all phases of atherosclerosis.

Objectives: To investigate prospectively the gut barrier function, endotoxin translocation and inflammatory response in ST-elevation myocardial infarction (STEMI) patients undergoing primary percutaneous coronary artery intervention (PPCI).

Methods: Twenty-seven patients with STEMI that underwent successful PPCI were subjected to peripheral blood sampling at 3-time points; before PPCI (day0), 24 h (day1) and 96 h (day4) after PPCI and were compared with 20 chronic coronary syndrome (CCS) patients and 11 healthy controls.

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SARS-CoV-2 is responsible for the global coronavirus disease 2019 (COVID-19) pandemic. While the cardiovascular effects of COVID-19 have been thoroughly described, there are limited published studies in the literature establishing a connection between spontaneous coronary artery dissection (SCAD) and COVID-19. Cardiovascular manifestations include, among others, myocarditis, acute myocardial infraction, and thrombosis.

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Background: Left bundle branch area pacing (LBBAP) is an emerging pacing method that may prevent the deleterious effects of right ventricular pacing. The aim of this study is to compare the effects of LBBAP with right ventricular septal pacing (RVSP) in patients with advanced atrioventricular conduction abnormalities and preserved left ventricular ejection fraction.

Methods: The effect of pacing was evaluated by echocardiographic indices of dyssynchrony, including global myocardial work efficiency (GWE) and peak systolic dispersion (PSD).

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Background: Systemic inflammation in chronic kidney disease (CKD) is associated (as a cause or effect) with intestinal barrier dysfunction and increased gut permeability, with mechanisms not yet fully understood. This study investigated different parameters of the intestinal barrier in CKD patients, especially tight junction (TJ) proteins and their possible association with systemic endotoxemia and inflammation.

Methods: Thirty-three patients with stage I-IV CKD (n = 17) or end-stage kidney disease (ESKD) (n = 16) and 11 healthy controls underwent duodenal biopsy.

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The optimal duration of DAPT after complex PCI remains under investigation. The purpose of this systematic review and meta-analysis was to explore the safety and efficacy of a one-month therapy period versus a longer duration of DAPT after complex PCI. We systematically screened three major databases, searching for randomized controlled trials or sub-analyses of them, which compared shortened DAPT (S-DAPT), namely, one month, and longer DAPT (L-DAPT), namely, more than three months.

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Although intestinal microbiota alterations (dysbiosis) have been described in heart failure (HF) patients, the possible mechanisms of intestinal barrier dysfunction leading to endotoxemia and systemic inflammation are not fully understood. In this study, we investigated the expression of the intestinal tight junction (TJ) proteins occludin and claudin-1 in patients with HF with reduced (HFrEF) or preserved ejection fraction (HFpEF) and their possible association with systemic endotoxemia and inflammation. Ten healthy controls and twenty-eight patients with HF (HFrEF (n = 14), HFpEF (n = 14)) underwent duodenal biopsy.

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Patients with COVID-19 often experience significant cardiovascular complications, including heart failure, myocarditis, and acute coronary syndrome. We present the case of a male patient with severe COVID-19 pneumonia, complicated with inferior ST-segment elevation myocardial infarction (STEMI), which was attributed to spontaneous coronary artery dissection (SCAD). We also make a review of the literature on case reports of patients with COVID-19 and acute myocardial infarction due to SCAD.

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Aim of our systematic review and meta-analysis is to compare shortened (≤3 months) dual antiplatelet therapy (DAPT) with longer DAPT in diabetic patients undergoing percutaneous coronary interventions.We systematically screened 3 major databases (MEDLINE, Cochrane Central Register of Controlled Trials, and Scopus) searching for randomized-controlled trials or subanalyses of them, which compared shortened DAPT (S-DAPT) with longer DAPT regimens of DAPT. Primary end point of systematic review and meta-analysis is the net adverse clinical events (NACE), and secondary are major adverse cardiac events (MACE), mortality, bleedings, myocardial infarction, and stent thrombosis.

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Article Synopsis
  • - Drug-coated balloons have been evaluated for safety and effectiveness in treating coronary and peripheral artery disease, with this study focusing on a new everolimus-coated balloon (ECB) in a swine model.
  • - Thirty-two swine arteries were tested over 90 days in four groups, comparing different drug dosages of the ECB and other balloon types for their impact on arterial health.
  • - Results indicated that the ECB was safe and effective, with one dosage showing the best outcomes, suggesting that the amount of everolimus used could influence how well the balloon works in preventing artery narrowing.
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