Georgios Evaggelos Papadopoulos

Dr. Georgios Evaggelos Papadopoulos

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Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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23 March 2024 in Journal of Clinical Medicine
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Journal Article
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GPGeorgios Evaggelos Papadopoulos
Georgios Evaggelos Papadopoulos
Foteini BalomenouFoteini Balomenou
Foteini Balomenou
XSXenofon Sakellariou
Xenofon Sakellariou
CTChristos Tassopoulos
Christos Tassopoulos
DNDimitrios N. Nikas
Dimitrios N. Nikas
Theofilos KolettisTheofilos Kolettis
Theofilos Kolettis
Background: Obesity is invariably accompanied by autonomic dysfunction, although data in pediatric populations are conflicting. Methods: We conducted a systematic review and meta-analysis of 12 studies (totaling 1102 participants) comparing obese and normal-weight subjects (5–18 years of age), defined as body mass index >95th or <85th percentile, respectively. Using a random-effects model, we report the standardized mean differences (SMD) of sympathetic and vagal indices of heart rate variability. Results: Autonomic dysfunction was present in the obesity group, based on the average SMD in the standard deviation of sinus intervals (at −0.5340), and on the ratio of low (LF)- to high (HF)-frequency spectra (at 0.5735). There was no difference in sympathetic activity, but the heterogeneity among the relevant studies weakens this result. SMD in HF (at 0.5876), in the root mean square of successive differences between intervals (at −0.6333), and in the number of times successive intervals exceeded 50 ms divided by the total number of intervals (at −0.5867) indicated lower vagal activity in the obesity group. Conclusions: Autonomic dysfunction is present in obese children and adolescents, attributed to lower vagal activity. Further studies are needed in various pediatric cohorts, placing emphasis on sympathetic activity.

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GPGeorgios Evaggelos Papadopoulos
Georgios Evaggelos Papadopoulos
TETheoxaris I. Evaggelou
Theoxaris I. Evaggelou
EMErrikos K. Moulias
Errikos K. Moulias
OTOrestis Tsonis
Orestis Tsonis
KZKONSTANTINOS ZEKIOS
KONSTANTINOS ZEKIOS
Theofilos KolettisTheofilos Kolettis
Theofilos Kolettis
Takotsubo syndrome is a serious complication of labor. Although the pathophysiologic role of excessive sympathetic activation is established in this process, concurrent vagal responses have not been adequately described. Moreover, it remains unclear whether autonomic activity depends on the mode of delivery. Here, we explored the hypothesis that the different management of cesarean and vaginal delivery may elicit diverse responses affecting both autonomic arms. For this aim, continuous electrocardiographic recording was performed in 20 women during labor, and non-invasive indices of sympathetic and vagal activity were compared between the two modes of delivery. We report sympathetic prevalence during cesarean delivery, caused by marked vagal withdrawal, whereas autonomic activity was rather stable during vaginal delivery. These differences may be attributed to the effects of anesthesia during cesarean delivery, along with the protective effects of oxytocin administration during vaginal delivery. Our results provide further insights on autonomic responses during labor that may prove useful in the prevention of complications, such as takotsubo syndrome.

1 May 2010 in International Journal of Cardiology
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Journal Article
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Sophie I. MavrogeniSophie I. Mavrogeni
Sophie I. Mavrogeni
GPGeorgios Evaggelos Papadopoulos
Georgios Evaggelos Papadopoulos
EKE. Karanasios
E. Karanasios
Dimitrios GeorgakopoulosDimitrios Georgakopoulos
Dimitrios Georgakopoulos
MMMENELAOS MANOUSSAKIS
MENELAOS MANOUSSAKIS

18 November 2025 in Reviews in Cardiovascular Medicine
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Journal Article
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GPGeorgios Evaggelos Papadopoulos
Georgios Evaggelos Papadopoulos
INIlias Ninios
Ilias Ninios
SESotirios Evangelou
Sotirios Evangelou
AIAndreas Ioannides
Andreas Ioannides
GGGrigorios Giamouzis
Grigorios Giamouzis
VNVlasis Ninios
Vlasis Ninios
Tricuspid regurgitation (TR), a condition that was once thought to be of little clinical importance, is now recognized as a progressive disease associated with increased morbidity and mortality. Despite the prevalence of TR, this condition remains undertreated due to the absence of effective medical therapy and high surgical risk. However, tricuspid transcatheter edge-to-edge repair (T-TEER) using the TriClip system has emerged as a new approach, offering a minimally invasive alternative for patients with symptomatic severe TR and prohibitive surgical risk. Thus, this comprehensive review outlines a step-by-step approach to TriClip implantation, encompassing anatomical and pathophysiological foundations, patient selection criteria, imaging protocols, and procedural techniques. Emphasis is placed on the critical role of transesophageal echocardiography for device guidance, leaflet grasping, and confirmation of procedural success. Moreover, key intra-procedural challenges and troubleshooting strategies are discussed in detail, along with post-procedural management, including antithrombotic therapy, imaging surveillance, and functional assessment. Comparative insights between TriClip and the PASCAL system are provided, highlighting technical and clinical differences, as well as implications for device selection. The emerging role of combined mitral and tricuspid TEER using a single steerable guide catheter is also explored, supported by early data suggesting the safety and efficacy of this combination. Evidence from randomized trials and real-world registries supports the safety, feasibility, and durability of TriClip-based T-TEER. Notably, as experience and technology continue to evolve, T-TEER is positioned to become a cornerstone in the management of functional TR in high-risk populations.

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GPGeorgios Evaggelos Papadopoulos
Georgios Evaggelos Papadopoulos
INIlias Ninios
Ilias Ninios
SESotirios Evangelou Sotirios Evangelou
Sotirios Evangelou Sotirios Evangelou
AIAndreas Ioannides
Andreas Ioannides
VNVlasis Ninios
Vlasis Ninios
Paravalvular leak (PVL) remains a clinically important complication after surgical or transcatheter valve implantation, presenting predominantly with heart failure (HF) and/or high-shear hemolysis. While redo surgery can be definitive, contemporary candidates frequently carry prohibitive operative risk, positioning transcatheter PVL closure as a key therapeutic alternative. However, available outcome data are largely derived from observational series and registries with heterogeneity in PVL mechanisms, prosthesis types, imaging protocols, and endpoint definitions. Standardized frameworks—such as those proposed by the PVL Academic Research Consortium—support harmonized PVL grading and clinically meaningful composite endpoints that integrate imaging/hemodynamic results with patient-centered outcomes. Across datasets, the most consistent determinant of benefit is residual PVL severity: procedural efficacy is most commonly defined as achieving ≤ mild residual regurgitation without prosthetic leaflet interference, device embolization, or major complications. This review provides a step-by-step, phenotype-driven approach to transcatheter PVL closure, emphasizing multimodality imaging (TEE and cardiac CT, with adjunct CMR and PET when appropriate), access and support planning tailored to valve position, and morphology-matched device selection—often requiring modular multi-device strategies for elongated crescentic channels, particularly in hemolysis-predominant presentations. We also synthesize evidence on complications and bailout management, with a focus on preventable high-severity events (leaflet impingement, embolization, stroke/air, vascular injury, tamponade) and standardized pre-release safety checks. Collectively, contemporary practice supports high implant success in experienced programs, with clinical improvement tightly coupled to procedural endpoint quality and careful Heart Team selection.

19 November 2023 in Life
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GPGeorgios Evaggelos Papadopoulos
Georgios Evaggelos Papadopoulos
Alexandra ArvanitakiAlexandra Arvanitaki
Alexandra Arvanitaki
EMEleftherios Markidis
Eleftherios Markidis
SMSophia Anastasia Mouratoglou
Sophia Anastasia Mouratoglou
IFIoannis Farmakis
Ioannis Farmakis
George GiannakoulasGeorge Giannakoulas
George Giannakoulas
Advances in the diagnosis and treatment of pulmonary hypertension (PH) have gradually improved the disease course. This retrospective cohort study aims to explore the diagnostic hemodynamic profile and survival of PH patients and their temporal changes, as well as investigate potential prognostic factors. Overall, 257 adult patients were diagnosed with PH following right heart catheterization (RHC) from January 2008 to June 2023 according to the hemodynamic cut-off values proposed by the corresponding ESC/ERS guidelines at the time RHC was performed. Of these patients, 46.3% were Group 1, 17.8% Group 2, 14.0% Group 3, 18.0% Group 4, and 3.0% Group 5 PH. Temporal improvement in both diagnostic hemodynamic profile and survival of patients with PH and pulmonary arterial hypertension (PAH) was identified after 2013. Survival analysis demonstrated 5-year survival rates of 65% in Group 1 PH (90.3% in idiopathic PAH) and 77% in Group 4 PH. PAH patients being at low risk at diagnosis presented a similar 1-year all-cause mortality rate (12.4%) with high-risk ones (12.8%), primarily due to non-PH-related causes of death (62%), while high-risk patients died mostly due to PH (67%). The observed improvements in diagnostic hemodynamic profiles and overall survival highlight the importance of timely diagnosis and successful treatment strategies in PH.