1. Articles from Alberto Cremonesi

    1-13 of 13
    1. The role of residual intrastent thrombus during primary angioplasty: insights from the COCTAIL II study

      The role of residual intrastent thrombus during primary angioplasty: insights from the COCTAIL II study

      Aims: Recent frequency-domain optical coherence tomography studies showed that a complete removal of thrombotic materials is rarely achieved after percutaneous coronary interventions for ST segment elevation myocardial infarction. Residual intrastent thrombus can embolize distally leading to microcirculatory injury. The aim was to find a possible correlation between residual intrastent thrombus and angiographic indexes of myocardial reperfusion. Methods: The population consisted of 128 ST segment elevation myocardial infarction patients enrolled in the COCTAIL II trial. Intrastent thrombus at optical coherence tomography was defined as the maximum percentage value of thrombus area (thrombus area/stent area × 100 in the cross-section with largest ...

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      Mentions: Francesco Prati
    2. Optical Coherence Tomography during carotid artery stenting: A new niche application?

      Optical Coherence Tomography during carotid artery stenting: A new niche application?

      In the past decades angiography has been the keystone to assess vascular anatomy, leading to the development of largely applied percutaneous revascularisation techniques. However, angiography can only provide a limited analysis of lumen profile without the possibility to disclose vessel wall characteristics and composition of atherosclerotic lesions. Intravascular ultrasound (IVUS), introduced in the early ‘90ies, followed more then a decade after by optical coherence tomography (OCT) provide information about intravascular anatomy that far exceeds the level of detail obtained from conventional angiography.

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    3. Suboptimal stent deployment is associated with subacute stent thrombosis: Optical Coherence Tomography insights from a multicenter matched study. From the CLI Foundation investigators: the CLI-THRO study

      Suboptimal stent deployment is associated with subacute stent thrombosis: Optical Coherence Tomography insights from a multicenter matched study. From the CLI Foundation investigators: the CLI-THRO study

      Background Acute or sub-acute stent thrombosis (ST) is a well described complication usually causing acute coronary syndromes (ACS) and in the worst case scenario sudden cardiac death. In this study we aimed at exploring the potential role of optical coherence tomography (OCT) in the understanding of the mechanism of ST. Methods Twenty-one consecutive patients, after ACS due to a definite sub-acute ST, were assessed with OCT and matched 1:2 with 42 patients undergoing OCT for scheduled follow-up. OCT assessment was focused on features indicative of non-optimal stent deployment: under-expansion, malapposition, edge dissection and reference lumen narrowing. Results OCT revealed ...

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    4. Quantification of manual thrombus removal in patients with acute coronary syndromes: a study exploiting serial frequency domain-optical coherence tomography

      Quantification of manual thrombus removal in patients with acute coronary syndromes: a study exploiting serial frequency domain-optical coherence tomography

      Aims: Thrombus aspiration is useful in improving myocardial reperfusion in comparison to conventional percutaneous coronary intervention in patients with acute myocardial infarction. Nonetheless, assessment of thrombus aspiration efficacy is lacking. Aim of this study was to quantify by frequency domain optical coherence tomography (OCT) the amount of thrombus removal in patients with acute coronary syndromes undergoing manual thrombus aspiration, correlating it with the actual size of the retrieved material. Methods: Twenty-five consecutive patients with acute coronary syndrome were enrolled. OCT assessment of thrombotic lesions was performed before and after thrombus aspiration and repeated after stent deployment. OCT thrombus assessment was ...

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      Mentions: Francesco Prati
    5. Stent-related defects in patients presenting with stent thrombosis: differences at optical coherence tomography between subacute and late/very late thrombosis in the Mechanism Of Stent Thrombosis (MOST) study

      Stent-related defects in patients presenting with stent thrombosis: differences at optical coherence tomography between subacute and late/very late thrombosis in the Mechanism Of Stent Thrombosis (MOST) study

      Aims: Subacute, late, and very late stent thrombosis (ST) may occur after stent implantation, but they are characterised by different underlying pathophysiological mechanisms. We sought to appraise differences between subacute and late/very late ST at the thrombus site by optical coherence tomography (OCT). The Mechanism Of Stent Thrombosis (MOST) study was a prospective multicentre non-randomised registry which enrolled six subacute ST and six controls (subacute ST study), and 17 late/very late ST and 17 controls (late/very late ST study). Methods and results: Patients with subacute ST had a minimum stent area at the thrombus site of 2 ...

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    6. Safety and efficacy of saline infusion for optical coherence tomography evaluation of vascular lesion induced by renal nerve ablation

      Safety and efficacy of saline infusion for optical coherence tomography evaluation of vascular lesion induced by renal nerve ablation

      Renal nerve ablation (RNA) using radiofrequency (RF) catheter-based has been recently proposed for the treatment of severe drug-resistant hypertension . Despite preliminary animal studies showing the safety and efficacy of this procedure, recent in-human studies highlighted the possibility of vascular lesions following RF emission . Templin et al. recently evaluated 32 renal arteries before and after the RNA-procedure using optical coherence tomography (OCT) .

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    7. Association Between Proximal Stent Edge Positioning on Atherosclerotic Plaques Containing Lipid Pools and Postprocedural Myocardial Infarction (from the CLI-POOL Study)

      Association Between Proximal Stent Edge Positioning on Atherosclerotic Plaques Containing Lipid Pools and Postprocedural Myocardial Infarction (from the CLI-POOL Study)

      Postprocedural myocardial infarction is an ominous complication of percutaneous coronary intervention (PCI). Despite several patient, lesion, and procedural factors that may affect its occurrence and severity, it is unclear if implanting a stent edge on a coronary lipid pool, as appraised by optical coherence tomography (OCT), adversely affects outcomes. The aim of this study was to assess the association between postprocedural myocardial infarction and the implantation of a stent edge on a lipid pool, as assessed by OCT. A database was screened for patients without ongoing myocardial infarctions; who underwent PCI with stenting for single, native, de novo lesions; without ...

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    8. Angiography alone versus angiography plus optical coherence tomography to guide decision-making during percutaneous coronary intervention: the Centro per la Lotta contro l’Infarto-Optimisation of Percutaneous Coronary Intervention (CLI-OPCI) study

      Angiography alone versus angiography plus optical coherence tomography to guide decision-making during percutaneous coronary intervention: the Centro per la Lotta contro l’Infarto-Optimisation of Percutaneous Coronary Intervention (CLI-OPCI) study

      Aims: Angiographic guidance for percutaneous coronary intervention (PCI) has substantial limitations. The superior spatial resolution of optical coherence tomography (OCT) could translate into meaningful clinical benefits. We aimed to compare angiographic guidance alone versus angiographic plus OCT guidance for PCI. Methods and results: Patients undergoing PCI with angiographic plus OCT guidance (OCT group) were compared with matched patients undergoing PCI with angiographic only guidance (Angio group) within 30 days. The primary endpoint was the one-year rate of cardiac death or myocardial infarction (MI). A total of 670 patients were included, 335 in the OCT group and 335 in the Angio ...

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    9. Reproducibility of Coronary Optical Coherence Tomography for Lumen and Length Measurements in Humans (The CLI-VAR [Centro per la Lotta contro l'Infarto-VARiability] Study)

      Reproducibility of Coronary Optical Coherence Tomography for Lumen and Length Measurements in Humans (The CLI-VAR [Centro per la Lotta contro l'Infarto-VARiability] Study)

      Frequency-domain optical coherence tomography (FD-OCT) is becoming a useful diagnostic tool for coronary imaging for quantitative coronary analysis. Second-generation FD-OCT produces detailed coronary lumen images. However, the reproducibility of coronary measurements using FD-OCT in humans has not been thoroughly explored. Our goal was to determine the intraobserver, interobserver, and interpullback reproducibility of the in vivo FD-OCT measurements of the lumen area and/or lesion length. Twenty-five patients undergoing coronary angioplasty were included. In all subjects, FD-OCT pullbacks (20 mm/s) were acquired twice from the same coronary segment different from the target lesion, at an interval of 5 minutes, with ...

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    10. Reproducibility of Coronary Optical Coherence Tomography for Lumen and Length Measurements in Humans (The CLI-VAR [Centro per la Lotta contro l'Infarto-VARiability] Study)

      Reproducibility of Coronary Optical Coherence Tomography for Lumen and Length Measurements in Humans (The CLI-VAR [Centro per la Lotta contro l'Infarto-VARiability] Study)

      Frequency-domain optical coherence tomography (FD-OCT) is becoming a useful diagnostic tool for coronary imaging for quantitative coronary analysis. Second-generation FD-OCT produces detailed coronary lumen images. However, the reproducibility of coronary measurements using FD-OCT in humans has not been thoroughly explored. Our goal was to determine the intraobserver, interobserver, and interpullback reproducibility of the in vivo FD-OCT measurements of the lumen area and/or lesion length. Twenty-five patients undergoing coronary angioplasty were included. In all subjects, FD-OCT pullbacks (20 mm/s) were acquired twice from the same coronary segment different from the target lesion, at an interval of 5 minutes, with ...

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    11. Preliminary experience with optical coherence tomography imaging to evaluate carotid artery stents: safety, feasibility and techniques

      Preliminary experience with optical coherence tomography imaging to evaluate carotid artery stents: safety, feasibility and techniques
      Aims: Optical coherence tomography (OCT) is an increasingly used intravascular imaging modality to assess coronary stent implantation and vessel healing. A recently developed catheter (C7 Dragonfly™; LightLab Imaging Inc.,Westford, MA, USA) allows visualisation of peripheral arteries up to 10 mm of diameter with high speed pullback. Safety, feasibility and the technique of OCT following carotid artery stenting (CAS) were evaluated in the present study. Methods and results: OCT was performed in seven consecutive patients following successful CAS using proximal cerebral protection devices, occluding the common and external carotid artery and gentle manual injection of a total of 8-14 ml ...
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    1-13 of 13
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  2. Topics in the News

    1. (8 articles) Francesco Prati
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    3. (3 articles) St. Jude Medical
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    5. (2 articles) University of Catania
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    Preliminary experience with optical coherence tomography imaging to evaluate carotid artery stents: safety, feasibility and techniques Reproducibility of Coronary Optical Coherence Tomography for Lumen and Length Measurements in Humans (The CLI-VAR [Centro per la Lotta contro l'Infarto-VARiability] Study) Reproducibility of Coronary Optical Coherence Tomography for Lumen and Length Measurements in Humans (The CLI-VAR [Centro per la Lotta contro l'Infarto-VARiability] Study) Angiography alone versus angiography plus optical coherence tomography to guide decision-making during percutaneous coronary intervention: the Centro per la Lotta contro l’Infarto-Optimisation of Percutaneous Coronary Intervention (CLI-OPCI) study Association Between Proximal Stent Edge Positioning on Atherosclerotic Plaques Containing Lipid Pools and Postprocedural Myocardial Infarction (from the CLI-POOL Study) Safety and efficacy of saline infusion for optical coherence tomography evaluation of vascular lesion induced by renal nerve ablation Stent-related defects in patients presenting with stent thrombosis: differences at optical coherence tomography between subacute and late/very late thrombosis in the Mechanism Of Stent Thrombosis (MOST) study Saline vs contrast infusion during optical coherence tomography imaging of peripheral percutaneous intervention Quantification of manual thrombus removal in patients with acute coronary syndromes: a study exploiting serial frequency domain-optical coherence tomography Suboptimal stent deployment is associated with subacute stent thrombosis: Optical Coherence Tomography insights from a multicenter matched study. From the CLI Foundation investigators: the CLI-THRO study The multi-spectral signal properties of multiple reference optical coherence tomography (Thesis) Calibration-free time-stretch optical coherence tomography with large imaging depth