Publications by authors named "Frederik M Zimmermann"

Background: Outcomes in women after fractional flow reserve (FFR)-guided percutaneous coronary intervention (PCI) using current-generation drug-eluting stents (DES) compared with coronary artery bypass grafting (CABG) are unknown.

Objectives: This study sought to evaluate differences in clinical outcomes according to sex after FFR-guided PCI with current generation DES compared with CABG.

Methods: The FAME 3 trial was an investigator-initiated, randomized controlled trial, comparing FFR-guided PCI with current generation DES or CABG in patients with 3-vessel coronary artery disease.

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Background: The clinical impact of a chronic total occlusion (CTO) in patients with 3-vessel coronary artery disease undergoing fractional flow reserve-guided percutaneous coronary intervention (PCI) with current-generation drug-eluting stents or coronary artery bypass grafting (CABG) is unclear.

Methods: The FAME 3 trial (Fractional Flow Reserve Versus Angiography for Multivessel Evaluation 3) compared fractional flow reserve-guided PCI with CABG in patients with 3-vessel coronary artery disease. The primary end point was major adverse cardiac and cerebrovascular events, a composite of death, myocardial infarction, stroke, or repeat revascularization at 1 year.

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Background: Coronary disease complexity is commonly used to guide revascularization strategy in patients with multivessel disease (MVD).

Objectives: The aim of this study was to assess the interactive effects of coronary complexity on percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG) outcomes and identify the optimal threshold at which PCI can be considered a reasonable option.

Methods: A total of 1,444 of 1,500 patients with MVD from the FAME (Fractional Flow Reserve versus Angiography for Multi-vessel Evaluation) 3 randomized trial were included in the analysis (710 CABG vs 734 PCI).

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Article Synopsis
  • The microvascular resistance reserve (MRR) is a new index developed to evaluate the vasodilatory capacity of the microcirculation, particularly relevant for patients with ST-segment elevation myocardial infarction (STEMI), whose prognostic value was previously unknown.
  • This study analyzed data from 1,265 STEMI patients, focusing on a subgroup where both MRR and index of microcirculatory resistance (IMR) were available, to compare their effectiveness in predicting long-term outcomes.
  • The findings revealed that MRR is a significant predictor of long-term all-cause mortality or heart failure hospitalization, with a cutoff value of 1.25 indicating higher risk when below this level.
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Background: Diffuse coronary artery disease affects the safety and efficacy of percutaneous coronary intervention (PCI). Pathophysiologic coronary artery disease patterns can be quantified using fractional flow reserve (FFR) pullbacks incorporating the pullback pressure gradient (PPG) calculation. This study aimed to establish the capacity of PPG to predict optimal revascularization and procedural outcomes.

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Background: Fluid-filled pressure guidewires are unaffected by the previously inevitable hydrostatic pressure gradient (HPG). This study aimed to compare simultaneous pressure measurements with fluid-filled and sensor-tipped pressure guidewires.

Methods: Fifty patients underwent fractional flow reserve (FFR) and P/P measurement with a fluid-filled and a sensor-tipped pressure guidewire simultaneously.

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Article Synopsis
  • Despite primary PCI treatment for STEMI, patients still face high risks of heart failure and late death due to microvascular dysfunction, measured by IMR.
  • The study aims to determine if IMR is an independent predictor of cardiac death, identify the optimal cutoff value of IMR, and compare it to other cardiac parameters.
  • Results from 1,265 patients show that a higher IMR (especially >40) is associated with increased cardiac mortality and hospitalization for heart failure, establishing an optimal cutoff value of 70 for predicting cardiac death.
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Unlabelled: The optimal treatment strategy for coronary bifurcation lesions by percutaneous coronary intervention (PCI) is complex and remains a subject of debate. Current guidelines advise a stepwise provisional approach with optional two-stent strategy. However, a two-stent strategy, both upfront and stepwise provisional, is technically demanding.

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Background: The functional SYNTAX score (FSS), which incorporates functional information as assessed by fractional flow reserve (FFR), is a better predictor of outcome after percutaneous coronary intervention (PCI) in patients with less complex coronary artery disease (CAD).

Objectives: This study sought to test the prognostic value of the FSS in patients with complex CAD eligible for coronary artery bypass grafting (CABG).

Methods: The FAME 3 (Fractional Flow Reserve Versus Angiography for Multivessel Evaluation 3) trial compared FFR-guided PCI with CABG in patients with angiographic 3-vessel CAD.

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Introduction: Diffuse disease has been identified as one of the main reasons leading to low post-PCI fractional flow reserve (FFR) and residual angina after PCI. Coronary pressure pullbacks allow for the evaluation of hemodynamic coronary artery disease (CAD) patterns. The pullback pressure gradient (PPG) is a novel metric that quantifies the distribution and magnitude of pressure losses along the coronary artery in a focal-to-diffuse continuum.

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Background: Previous studies comparing percutaneous coronary intervention (PCI) with coronary artery bypass grafting (CABG) in patients with multivessel coronary disease not involving the left main have shown significantly lower rates of death, myocardial infarction (MI), or stroke after CABG. These studies did not routinely use current-generation drug-eluting stents or fractional flow reserve (FFR) to guide PCI.

Methods: FAME 3 (Fractional Flow Reserve versus Angiography for Multivessel Evaluation) is an investigator-initiated, multicenter, international, randomized trial involving patients with 3-vessel coronary artery disease (not involving the left main coronary artery) in 48 centers worldwide.

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Cardiac allograft vasculopathy is a leading cause of allograft failure and death among heart transplant recipients. Routine coronary angiography and intravascular ultrasound in the early posttransplant period are widely accepted as the current standard-of-care diagnostic modalities. However, many studies have now demonstrated that invasive coronary physiological assessment provides complementary long-term prognostic data and helps identify patients who are at risk of accelerated cardiac allograft vasculopathy and acute rejection.

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A 58-year-old male with prior history of mechanical aortic valve replacement (AVR) in 2009 for severe symptomatic aortic regurgitation in a bicuspid aortic valve, and since 2013 a new-onset severe asymptomatic primary mitral regurgitation (MR) due to prolapse of the anterior mitral valve leaflet (AMVL) presented himself with acute heart failure. Based on current guidelines recommendations, this patient was not eligible for transcutaneous mitral valve edge-to-edge repair (TEER), as well he was found as too high risk for conventional mitral valve repair. However, as a last resort TEER was undertaken with an unconventional strategy, which resulted in resolution of the MR and improvement of clinical, biochemical findings.

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Background: We evaluate the prognostic value of measuring fractional flow reserve (FFR) after percutaneous coronary intervention (post-PCI FFR) and intravascular imaging in patients undergoing PCI for 3-vessel coronary artery disease in the FAME 3 trial (Fractional Flow Reserve versus Angiography for Multivessel Evaluation).

Methods: The FAME 3 trial is a multicenter, international, randomized study comparing FFR-guided PCI with coronary artery bypass grafting in patients with multivessel coronary artery disease. PCI was not noninferior with respect to the primary end point of death, myocardial infarction, stroke, or repeat revascularization at 1 year.

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Background: Previous studies have shown that quality of life improves after coronary revascularization more so after coronary artery bypass grafting (CABG) than after percutaneous coronary intervention (PCI). This study aimed to evaluate the effect of fractional flow reserve guidance and current generation, zotarolimus drug-eluting stents on quality of life after PCI compared with CABG.

Methods: The FAME 3 trial (Fractional Flow Reserve Versus Angiography for Multivessel Evaluation) is a multicenter, international trial including 1500 patients with 3-vessel coronary artery disease who were randomly assigned to either CABG or fractional flow reserve-guided PCI.

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The timely revascularization of an occluded coronary artery is the cornerstone of treatment in patients with ST-elevation myocardial infarction (STEMI). As essential as this treatment is, it can also cause additional damage to cardiomyocytes that were still viable before reperfusion, increasing infarct size. This has been termed "myocardial reperfusion injury".

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Background: Single-center data suggest that the index of microcirculatory resistance (IMR) measured early after heart transplantation predicts subsequent acute rejection.

Objectives: The goal of this study was to validate whether IMR measured early after transplantation can predict subsequent acute rejection and long-term outcome in a large multicenter cohort.

Methods: From 5 international cohorts, 237 patients who underwent IMR measurement early after transplantation were enrolled.

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