Search Results (122)

Percutaneous coronary intervention (PCI) with drug-eluting stents (DESs) is the most used revascularization strategy in current clinical practice. However, this approach is still associated with a non-negligible risk of adverse events, including late and very late in-stent restenosis (ISR) and stent thrombosis, even with newer-generation DESs. Notably, long stents and the use of overlapping stents have been consistently identified as independent predictors of both ISR and stent thrombosis. Drug-coated balloons (DCBs) have emerged as a viable alternative to DESs. Initially evaluated in specific clinical settings, such as small-vessel disease and ISR, DCBs have demonstrated promising results in the treatment of more complex coronary lesions and higher-risk patient populations, including elderly, diabetics and those at high bleeding risk. Their main advantage lies in avoiding permanent implantation of metallic struts and polymer coatings, thereby preserving coronary vasomotor function and promoting positive vessel remodeling and late lumen enlargement. As a result, a hybrid or blended revascularization strategy combining DESs and DCBs has gained increasing interest, offering the potential to harness the complementary benefits of both DESs and DCBs, while minimizing stent overlap and total stent length. Some studies have explored this approach, particularly for the treatment of diffuse coronary artery disease and bifurcation lesions. This narrative review aims to outline the pathophysiological rationale underlying a blended DCB/DES approach and to summarize the currently available clinical evidence. Furthermore, we discuss future perspectives for optimizing the combination DCB and DES PCI in real-world practice. Full article

Background: Drug-coated balloons (DCBs) have transformed percutaneous coronary intervention (PCI) by delivering antiproliferative drugs without leaving a permanent scaffold. DCB is initially indicated for in-stent restenosis (ISR) and now has expanded indication for treating small vessel disease and bifurcation lesions. However, there is a heterogeneity in the patient and lesion selection, lesion preparation techniques, and the optimal duration of dual antiplatelet therapy after DCB angioplasty. The Cardiovascular Intervention Association of Thailand (CIAT) developed a consensus statement on DCB use in coronary interventions. Methods: The CIAT expert panel systematically reviewed randomized controlled trials, meta-analyses, and real-world studies evaluating DCB therapy. Procedural strategies, imaging guidance, physiologic assessment, and antiplatelet therapy protocols were appraised. The recommendations were developed and put to an online vote. Consensus was defined when the recommendation reached 80% of votes in support of “agree” or “neutral”. Results: Clinical evidence demonstrates that DCBs achieve comparable outcomes to drug-eluting stents (DESs) in selected lesions while enabling shorter durations of dual antiplatelet therapy (DAPT), particularly beneficial for high-bleeding-risk patients. Optimal outcomes require meticulous lesion preparation, appropriate balloon sizing, and controlled vessel dissection. Intravascular imaging and physiologic assessment further refine procedural precision, while hybrid strategies combining DCBs and DESs address complex lesions and multivessel disease. The final document presents 15 consensus statements addressing indications, procedural techniques, imaging and physiologic guidance, and antiplatelet therapy recommendations. Conclusions: DCB angioplasty can be an alternative or complement to therapeutic options to DESs across multiple clinical and anatomical scenarios. The CIAT consensus provided structured recommendations to support DCB therapy in contemporary practice. Full article

Percutaneous coronary intervention (PCI) of bifurcation lesions remain one of the most technically challenging areas in interventional cardiology. Careful planning and execution are needed to preserve main vessel and side branch patency, with evolving evidence guiding the choice between provisional and two-stent strategies, and between individual techniques. This narrative review, which represents the first installment of a two-part series, synthesizes current knowledge on bifurcation PCI, detailing the anatomical classifications, lesion assessment tools, procedural planning, and execution of techniques including T and Protrusion (TAP), double-kissing (DK) crush, mini-crush, culotte, V-stent, and emerging modifications. We contextualize the choice of strategy within lesion complexity, procedural goals, and patient-specific considerations. This review is intended as a visual, practical, technique-focused reference for interventionalists and interventional trainees involved in the management of bifurcation lesions. Full article

Circulatory disturbances in patients with acute coronary syndrome (ACS) undergoing percutaneous coronary intervention (PCI) present significant challenges in interventional cardiology. This review examines the pathophysiological mechanisms, management strategies, and outcomes associated with these hemodynamic complications, ranging from transient hypotension to severe cardiogenic shock (CS). The complex interplay between myocardial ischemia, reperfusion injury, and procedural stress creates a dynamic circulatory environment that requires careful monitoring and intervention. The review analyzes various causes of circulatory disturbances, including vasovagal reflexes, allergic reactions, cardiac arrhythmias, acute ischemia, and procedural complications. It emphasizes the importance of early recognition and appropriate management of these conditions to improve patient outcomes. The progression from hypotension to CS is examined, with a focus on assessment tools, prognostication, and revascularization strategies. The role of mechanical circulatory support devices in managing severe circulatory compromise is discussed, including intra-aortic balloon pumps, Impella devices, and veno-arterial extracorporeal membrane oxygenation (VA-ECMO). Recent randomized controlled trials have yielded mixed results regarding the efficacy of these devices, highlighting the need for a nuanced, patient-centered approach to their use. This comprehensive analysis provides clinicians with a framework for anticipating, identifying, and managing circulatory disturbances in ACS patients undergoing PCI. It underscores the importance of risk stratification, multidisciplinary approaches, and ongoing research to optimize patient care and improve outcomes in this high-risk population. Full article

Background: Intensive Cardiovascular Care Units (ICCUs) are critical in managing high-acuity cardiovascular conditions, yet contemporary data on evolving admission patterns and their association with outcomes are limited. Methods: We conducted a retrospective cohort study of all patients admitted to a tertiary-care ICCU between July 2019 and December 2024. Patients were stratified by admission period: early (2019–2021) and late (2022–2024). Baseline characteristics, index diagnosis, interventions, complications, and mortality outcomes were compared. The primary endpoints were in-hospital and one-year mortality. Results: The study included 6266 patients (median age 69 years, 32% female). Of them, 3125 and 3141 patients were admitted in the early and late periods, respectively. Patients in the later period exhibited a higher burden of co-morbidities, including increased rates of atrial fibrillation, cognitive impairment, and dialysis (p < 0.05 for all). The pattern of index diagnoses shifted, showing an increase in heart failure (5.6% vs. 3.7%, p = 0.001) and malignant arrhythmia admissions (13.9% vs. 9.3%, p < 0.001), alongside a decline in cases of NSTEMI and pulmonary embolism. The use of urgent percutaneous coronary intervention, transcatheter valvular interventions, and microaxial pumps increased, whereas intra-aortic balloon pump usage declined. In-hospital mortality remained consistent between the periods at 2.7%. However, adjusted one-year mortality was significantly reduced in the later period (adjusted HR 0.84, 95% CI 0.71–0.98, p = 0.037). Conclusions: Over five years, ICCU admissions showed increasing complexity and evolving procedural trends. Despite higher acuity, adjusted one-year survival improved, highlighting care advances and the value of continuous data-driven ICCU optimization. Full article

Cardiovascular diseases (CVDs) are increasingly being defined not only in terms of metabolic or purely vascular disorders, but also as complex immunometabolic disorders. One of the most groundbreaking discoveries in recent years is the role of neutrophil extracellular networks (NETs/NENs) as a key link between chronic vascular wall inflammation and thrombotic processes. In this article, we present a synthetic overview of the latest data on the biology of NETs/NENs and their impact on the development of atherosclerosis, endothelial dysfunction, and the mechanisms of immunothrombosis. We highlight how these structures contribute to the weakening of atherosclerotic plaque stability, impaired endothelial barrier integrity, platelet activation, and the initiation of the coagulation cascade. We also discuss the modulating role of classic risk factors such as hypertension, dyslipidemia, and exposure to tobacco smoke, which may increase the formation or hinder the elimination of NETs/NENs. We also focus on the practical application of this knowledge: we present biomarkers associated with the presence of NETs/NENs (cfDNA, MPO–DNA complexes, CitH3, NE), which may be useful in diagnostics and risk stratification, and we discuss innovative therapeutic strategies. In addition to classic methods for indirectly inhibiting NET/NEN formation (antiplatelet, anti-inflammatory, and immunometabolic agents), we present experimental approaches aimed at their neutralization and removal (e.g., DNase I, elastase, and myeloperoxidase inhibitors). We pay particular attention to the context of cardiac and cardiac surgical procedures (Percutaneous Coronary Intervention-PCI, coronary artery bypass grafting-CABG), where rapid NET/NEN bursts can increase the risk of acute thrombotic complications. The overall evidence indicates that NETs/NENs represent an innovative and promising research and therapeutic target, allowing us to view cardiovascular diseases in a new light—as a dynamic interaction of inflammatory, atherosclerotic, and thrombotic processes. This opens up new possibilities in diagnostics, combination treatment and personalisation of therapy, although further research and standardization of detection methods remain necessary. Full article

Background: Coronary imaging is increasingly used in chronic total occlusion percutaneous coronary intervention (CTO-PCI), but the impact of different imaging strategies on procedural decisions and outcomes remains unclear. Methods: We retrospectively analyzed 171 consecutive patients undergoing CTO-PCI, stratified by imaging strategy into four groups: angiography-only (n = 48), IVUS-guided (n = 42), CT-guided (n = 40) and CT + IVUS-guided (n = 41). Procedural and in-hospital clinical outcomes were compared. A multivariable logistic regression identified predictors of intense debulking techniques (defined as the use of rotational atherectomy or intravascular lithotripsy). Results: Imaging guidance was associated with progressively longer procedural (p < 0.001) and fluoroscopic time (p = 0.007). Similarly, an increased number of guidewires (p = 0.005) and balloons (p = 0.003) was used in the imaging groups, with the CT + IVUS groups showing the highest features. Regarding stenting characteristics, higher stent length and diameter (p = 0.01) were observed in the imaging groups. In patients with J-CTO score > 2, procedural success rates significantly increased with the use of coronary imaging (p = 0.01). Multivariable analysis showed that both J-CTO score (OR 2.0; 95% CI 1.3–3.0; p = 0.001) and imaging strategies (OR 1.6; 95% CI 1.02–2.4; p = 0.04) independently predicted the use of intense debulking techniques. Importantly, no significant differences were observed in in-hospital complications across groups. Conclusions: The use of coronary imaging, particularly the combination of IVUS and CT, is associated with more complex CTO lesions and led to increased procedural time, fluoroscopic time and more extensive stenting, as well as higher debulking usage. In complex CTO cases, coronary imaging was associated with higher procedural success rates. Imaging strategies independently predicted the need for advanced lesion preparation, beyond anatomical complexity, without compromising safety. Despite higher procedural demands, coronary imaging enables a more tailored and successful approach to CTO-PCI, particularly in complex cases. These findings underscore the pivotal role of multimodal imaging in the procedural planning and optimization of CTO-PCI. Full article

Acute myocardial infarction (AMI) remains the leading cause of death worldwide, with myocardial ischemia/reperfusion injury (MIRI) emerging as a significant factor influencing patient outcomes despite timely reperfusion therapy. MIRI refers to paradoxical myocardial damage that occurs upon restoration of coronary blood flow and is driven by complex inflammatory, oxidative, and metabolic mechanisms, which can exacerbate infarct size (IS), contributing to adverse outcomes. This review explores the molecular and cellular pathophysiology of MIRI, emphasizing both its clinical and forensic relevance. The principal mechanisms discussed include oxidative stress and mitochondrial dysfunction, calcium overload and ion homeostasis imbalance, inflammatory responses, with particular focus on the NLRP3 inflammasome and cytokine pathways, and multiple forms of cell death (apoptosis, necroptosis, pyroptosis, and autophagy). Additionally, the authors present original immunohistochemical findings from autopsy cases of patients who suffered ST-segment elevation myocardial infarction (STEMI) and underwent percutaneous coronary intervention (PCI), but subsequently died. These findings underscore that successful reperfusion does not completely prevent delayed complications, like arrhythmias, ventricular fibrillation (VF), and sudden cardiac death (SCD), often caused by secondary MIRI-related mechanisms. Moreover, the case series highlight the diagnostic value of inflammatory markers for pathologists in identifying MIRI as a contributing factor in such fatalities. Finally, immunotherapeutic strategies—including IL-1 and IL-6 inhibitors such as Canakinumab and Tocilizumab—are reviewed for their potential to reduce cardiovascular events and mitigate the effects of MIRI. The review advocates for continued multidisciplinary research aimed at improving our understanding of MIRI, developing effective treatments, and informing forensic investigations of reperfusion-related deaths. Full article

Percutaneous coronary intervention (PCI) is a widely performed revascularisation procedure for coronary artery disease. Although effective, its reliance on fluoroscopy and iodinated contrast exposes patients and operators to risks of radiation and nephrotoxicity. As PCI techniques have become more complex, interest has grown in imaging methods that reduce dependence on fluoroscopy and contrast. Electro-anatomical mapping systems (EAMS), developed for catheter navigation in electrophysiology, enable real-time three-dimensional visualisation without the need for fluoroscopy or contrast. By adapting coronary guidewires as electrodes, EAMS can reconstruct vessel anatomy and track interventional tools in real time. EAMS have demonstrated feasibility and safety in device implantation, and early studies suggest their applicability to PCI, where they may mitigate radiation and contrast exposure by providing an alternative method for guidewire and stent visualisation. This review provides a narrative overview of current evidence, outlining the technical principles, applications in device implantation, and the emerging role of EAMS in coronary intervention. Full article

Risk prediction models are increasingly used in the management of coronary artery disease (CAD), with applications ranging from diagnostic stratification to prognostic assessment and therapeutic guidance. In the context of CAD and percutaneous coronary intervention, clinical decision-making often relies on risk scores to estimate the likelihood of ischemic and bleeding events and to tailor antithrombotic strategies accordingly. Traditional scores are derived from clinical, anatomical, procedural, and laboratory variables, and their performance is evaluated based on discrimination and calibration metrics. While many established models are simple, interpretable, and externally validated, their predictive ability is often moderate and may be limited by outdated derivation cohorts, overfitting, or lack of generalizability. Recent advances have introduced artificial intelligence and machine learning models that can process large, high-dimensional datasets and identify patterns not apparent through conventional methods, with the aim to incorporate complex data; however, they are not exempt from limitations and struggle with integration into clinical practice. Notably, ethical issues, such as equity in model application, over-stratification, and real-world implementation, are of critical importance. The ideal predictive model should be accurate, generalizable, and clinically actionable. This review aims at providing an overview of the main predictive models used in the field of CAD and to discuss methodological challenges, with a focus on strengths, limitations and areas of applicability of predictive models. Full article

Background: Radiation exposure in the cardiac catheterization laboratory remains a critical occupational hazard for interventional cardiologists and staff, contributing to orthopedic injuries, cataracts, and malignancy. In parallel, procedural complexity continues to increase, demanding both precision and safety. Robotic-assisted percutaneous coronary intervention (R-PCI), alongside advanced shielding systems and imaging integration, has emerged as a transformative strategy to minimize radiation and enhance operator ergonomics. Objective: This state-of-the-art review synthesizes the current clinical evidence and technological advances that support a radiation-reduction paradigm in percutaneous coronary intervention (PCI), with a particular focus on the role of R-PCI platforms, procedural modifications, and emerging shielding technologies. Methods: We reviewed published clinical trials, registries, and experimental studies evaluating robotic PCI platforms, contrast and radiation dose metrics, ergonomic implications, procedural efficiency, and radiation shielding systems. Emphasis was given to the integration of CT-based imaging (coronary computed tomography angiography—CCTA, fractional flow reserve computed tomography—FFR-CT) and low-dose acquisition protocols. Results: R-PCI demonstrated technical success rates of 81–100% and clinical success rates up to 100% in both standard and complex lesions, with significant reductions in operator radiation exposure (up to 95%) and procedural ergonomic burden. Advanced shielding technologies offer radiation dose reductions ranging from 86% to nearly 100%, while integration of (CCTA), (FFR-CT), and Artificial Intelligence (AI) -assisted procedural mapping facilitates further fluoroscopy minimization. Robotic workflows, however, remain limited by lack of device compatibility, absence of haptic feedback, and incomplete integration of physiology and imaging tools. Conclusions: R-PCI, in combination with shielding technologies and imaging integration, marks a shift towards safer, radiation-minimizing interventional strategies. This transition reflects not only a technical evolution but a philosophical redefinition of safety, precision, and sustainability in modern interventional cardiology. Full article

Drug-coated balloons (DCBs) have transformed percutaneous coronary intervention (PCI) by delivering antiproliferative drugs directly to the arterial wall, offering a stent-less approach that mitigates the risks associated with permanent metallic implants. Initially developed for in-stent restenosis (ISR), DCBs have demonstrated robust efficacy in reducing neointimal hyperplasia and target lesion revascularization (TLR) rates across diverse coronary lesions, including small vessel disease (SVD), de novo lesions, and complex anatomies such as bifurcation lesions. Paclitaxel-coated balloons have long been the cornerstone of DCB therapy due to their established clinical outcomes, but sirolimus-coated balloons are emerging as a promising alternative with potentially superior safety profiles and sustained drug release. The pharmacological mechanism of DCBs relies on rapid drug transfer during brief balloon inflation, achieving high local concentrations without residual foreign material. Landmark trials, such as BASKET-SMALL 2, RESTORE SVD, and AGENT IDE, have demonstrated comparable or non-inferior outcomes of DCBs versus drug-eluting stents (DESs) in specific settings, with lower rates of stent thrombosis and shorter dual antiplatelet therapy (DAPT) requirements. Despite these advances, challenges persist, including optimizing drug formulations, ensuring uniform delivery, and addressing calcified lesions. Ongoing research into novel coatings, dual–drug systems, and artificial intelligence (AI)-guided interventions is poised to redefine PCI strategies. This review provides a comprehensive analysis of drug-coated balloon (DCB) angioplasty, not limited to specific clinical scenarios such as in-stent restenosis, small vessel disease, or bifurcation lesions, highlighting their transformative role in coronary artery disease (CAD) management. Instead, it addresses the full spectrum of pharmacological principles, mechanisms of action, clinical indications, comparative efficacy across various coronary artery disease contexts, and future directions of DCBs. Full article

Background: Despite advances in coronary artery disease (CAD) treatment, challenges persist, particularly in complex lesions. While percutaneous coronary intervention (PCI) is widely used, its outcomes can be affected by complications like restenosis. Optical coherence tomography (OCT), offering higher-resolution imaging than angiography, shows promise in guiding PCI. However, meta-analytical comparisons between OCT-guided and angiography-guided PCI remain limited. Methods: Databases, including PubMed, Scopus, Cochrane Library, and ClinicalTrials.gov, were queried through May 2025 to identify randomized controlled trials (RCTs) comparing OCT-guided PCI with angiography-guided PCI. Data were pooled using risk ratios (RRs) and mean difference (MD) with 95% confidence intervals (CIs) in a random-effects model. Results: Five RCTs involving 5737 patients (OCT: 2738 and angiography: 2999) were included. On pooled analysis, OCT-guided PCI was associated with a notable reduction in major adverse cardiovascular event (MACE) (RR: 0.71, p = 0.0001), cardiac mortality (RR: 0.43, p = 0.003), target lesion revascularization (TLR) (RR: 0.53, p = 0.007), and stroke (RR: 0.17, p = 0.02), compared to angiography-guided PCI. No significant differences were noted for all-cause mortality and myocardial infarction. Conclusions: In patients with complex coronary lesions, OCT-guided PCI reduces the risk of MACE, cardiac mortality, TLR, and stroke, compared to angiography-guided PCI only. This study supports incorporating advanced imaging techniques like OCT to improve clinical outcomes, especially in complex PCIs. Full article

Coronary microvascular obstruction and dysfunction (CMVO) frequently arise following primary percutaneous coronary intervention (PCI), particularly in individuals with myocardial infarction. Despite the restoration of epicardial blood flow, microvascular perfusion might still be compromised, resulting in negative clinical outcomes. CMVO is a complex condition resulting from a combination of ischemia, distal thrombotic embolization, reperfusion injury, and individual susceptibilities such as inflammation and endothelial dysfunction. The pathophysiological features of this condition include microvascular spasm, endothelial swelling, capillary plugging by leukocytes and platelets, and oxidative stress. Traditional angiographic assessments, such as Thrombolysis in Myocardial Infarction (TIMI) flow grade and myocardial blush grade, have limited sensitivity. Cardiac magnetic resonance imaging (CMR) stands as the gold standard for identifying CMVO, while the index of microvascular resistance (IMR) is a promising invasive option. Treatment approaches involve powerful antiplatelet drugs, anticoagulants, and supersaturated oxygen, yet no treatment has been definitively shown to reverse established CMVO. CMVO remains a significant therapeutic challenge in coronary artery disease management. Enhancing the comprehension of its core mechanisms is vital for the development of more effective and personalized treatment strategies. Full article

Coronary chronic total occlusions (CTOs) are diagnosed in a significant portion of patients undergoing coronary angiography and represent one of the most complex scenarios in contemporary percutaneous coronary interventions (PCI). This review systematically examines how adjunctive imaging modalities’—intravascular ultrasound (IVUS), optical coherence tomography (OCT), and coronary computed tomography angiography (CCTA)—co-registration enhances the precision and success rates of CTO-PCI during the procedure. The strategic integration of these technologies enables the development of patient-specific intervention strategies tailored to individual vascular architecture and lesion characteristics. This personalized approach marks a transition from standardized protocols to precision interventional cardiology, potentially optimizing procedural success rates while minimizing complications. Full article