Konstantinos Avranas

Mr. Konstantinos Avranas

orcid

Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

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

Representative Publications

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19 December 2023 in Journal of Vascular Surgery
Verified
Journal Article
Closed access
GTGergana T. Taneva
Gergana T. Taneva
APApostolos G. Pitoulias
Apostolos G. Pitoulias
KAKonstantinos Avranas
Konstantinos Avranas
MKMajid Kazemtash
Majid Kazemtash
NBNizar Abu Bakr
Nizar Abu Bakr
KDKonstantinos P. Donas
Konstantinos P. Donas

24 April 2025 in Journal of Endovascular Therapy
Verified
Journal Article
Closed access
KDKonstantinos P. Donas
Konstantinos P. Donas
APApostolos G. Pitoulias
Apostolos G. Pitoulias
DKDimitrios M. Kapetanios
Dimitrios M. Kapetanios
RLRalf Lehmann
Ralf Lehmann
KAKonstantinos Avranas
Konstantinos Avranas
Background: Coral reef aorta (CRA) is a rare and complex form of atherosclerosis, characterized by heavily calcified plaques in the abdominal aorta mainly infrarenal. In case of affecting the orifice of the superior mesenteric artery and the celiac trunk, treatment harbors the high risk of aortic rupture and 2-cavity urgent repair, peripheral, and visceral embolization. Case Summary: We report a novel endovascular treatment for a paravisceral CRA in a 78-year-old female patient with severe peripheral arterial disease, consisting of a combination of intravascular ultrasound (IVUS) and lithotripsy-assisted angioplasty with the new low-pressure large (L6, Shockwave ® ) balloon catheter. The balloon catheter reached 12 mm diameter with a low pressure of only 2 atm, avoiding high pressure and the risk of aortic rupture in an area in which a thoracoabdominal urgent repair and clamping would be associated with high morbidity and mortality. This approach resulted in an increase of the luminal gain based on IVUS measurements and improved infrastenotic blood pressure of 30 mmHg. The patient experienced resolution of the clinical symptoms, pulpable peripheral pulses, and sustained primary patency at the 6-month follow-up. This first reported case illustrates the effectiveness and safety of IVUS-assisted intravascular lithotripsy for paravisceral CRA with a new low-pressure balloon. Clinical Impact: Treatment of coral reef aorta affecting the renovisceral segment could be complex as endarterectomy at this level requires 2-cavity surgery and an endovascular treatment with angioplasty/ stent implantation includes the risk of rupture. Endovascular treatment of such lesions with the use of the new L6 ultralow-pressure IVL balloon (Shockwave Medical) with IVUS assessment could be a significant minimally invasive treatment option due to luminal gain with the use of a large (up to 12mm) IVL Balloon, inflated at 2-4 atmosphares minimizing the risk of rupture.

27 February 2024 in Journal of Clinical Medicine
Verified
Journal Article
Open access
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APApostolos G. Pitoulias
Apostolos G. Pitoulias
GTGergana T. Taneva
Gergana T. Taneva
KAKonstantinos Avranas
Konstantinos Avranas
NBNizar Abu Bakr
Nizar Abu Bakr
APApostolos G. Pitoulias
Apostolos G. Pitoulias
Konstantinos DonasKonstantinos Donas
Konstantinos Donas
The aim of the study is to evaluate the safety and effectiveness of rotational atherectomy-assisted balloon angioplasty (BTK-RA) for the treatment of isolated below the knee (BTK) atherosclerotic lesions and to compare the outcomes to plain old balloon angioplasty (POBA). Between January 2020 and September 2023, 96 consecutive patients with chronic limb threatening ischemia (CTLI) and isolated BTK-lesions underwent POBA (group A) or BTK-RA (group B). The primary outcome measures were: periprocedural technical success, primary patency, postoperative increase of the ankle branchial index (ABI), target lesion revascularization (TLR), limb salvage, minor amputation and death. Both techniques had similar technical success, operative time, intraprocedural complications and bailout stent implantations, independently of the operator’s experience. Group B had significantly higher primary patency rates (93.5% vs. 72.0%, respectively, p = 0.006), TLR (2.1% vs. 24%, p = 0.057), lower in-hospital stay (2.0–3.0 vs. 4.0–6.0 days, respectively, p < 0.001) and higher postoperative ABI (0.8–0.2 vs. 0.7–0.1, respectively, p = 0.008), compared to group A. Significant differences (POBA n: 20, 40%, BTK-RA n = 3, 6.5%) were found in minor amputation rates between the two groups (p < 0.001), while the respective limb salvage rates were similar in both groups (94.0% vs. 97.8%, p = 0.35). The use of BTK-RA for the treatment of BTK-lesions in patients with CTLI showed significant clinical advantages in comparison to POBA.

3 January 2024 in JACC: Case Reports
Verified
Journal Article
Open access
KAKonstantinos Avranas
Konstantinos Avranas
CEChristoph Eisenbach
Christoph Eisenbach
CFChrista Flechtenmacher
Christa Flechtenmacher
Korosoglou GrigoriosKorosoglou Grigorios
Korosoglou Grigorios
We present a case of detection of a right atrial mass during surveillance echocardiography, mimicking myxoma. Cardiac magnetic resonance and computed tomography revealed infiltration into the pericardium, suggesting malignancy. Abdominal computed tomography showed multiple liver masses that were histologically positive for metastatic amelanotic melanoma. Under immunotherapy adequate remission was achieved.

14 January 2025 in Journal of Clinical Medicine
Verified
Journal Article
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EBEfthymios Beropoulis
Efthymios Beropoulis
KAKonstantinos Avranas
Konstantinos Avranas
ERElena Rouvi
Elena Rouvi
Konstantinos DonasKonstantinos Donas
Konstantinos Donas
Background: Sirolimus-coated balloons (SCBs) have emerged as a promising alternative to paclitaxel-coated devices for the treatment of femoropopliteal lesions. However, real-world data on SCB performance in also complex peripheral arterial disease remains unknown. We sought to evaluate the safety and 12-month clinical outcomes of the Selution SLR™ balloon angioplasty in a challenging real-world patient cohort. Methods: This single-center, retrospective observational study with prospective follow-up included 21 patients with symptomatic peripheral arterial disease treated with the Selution SLR™ SCB (Med. Alliance, SA, Mont-sur-Rolle, Switzerland) after vessel preparation with rotational atherectomy, between October 2023 and November 2024. The primary endpoints were technical success, 12-month primary patency, and target lesion revascularization (TLR). Secondary endpoints included major adverse cardiac events (MACE), major adverse limb events (MALE), and changes in Rutherford classification and ankle-brachial index (ABI). Results: The median age was 79 years, with 47.6% of patients over 80 years old. Most patients presented with advanced peripheral atherosclerotic disease (PAD) (Rutherford category V, 47.6%). Lesions were predominantly occlusive (76.2%), with a median length of 130 mm and severe/moderate calcified in 71.4% of cases. Technical success was achieved in 95.2% of procedures. The 12-month primary patency was 95%, with a TLR-Rate of 5%. No major amputations or cardiovascular deaths occurred. Significant improvements in Rutherford category and ABI were maintained at 12 months. Conclusions: In this real-world cohort of patients with complex PAD, vessel preparation-assisted Selution SLR™ angioplasty demonstrated safety and promising 12-month outcomes. These findings support the use of SCBs in also challenging peripheral interventions, though larger-scale data and further follow up are needed in order to establish SCBs’ role as crucial in the treatment algorithm of PAD.

8 December 2022 in Journal of Clinical Medicine
Verified
Journal Article
Open access
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DMDimitrios Mouselimis
Dimitrios Mouselimis
SHSaskia Hagstotz
Saskia Hagstotz
MLMichael Lichtenberg
Michael Lichtenberg
Konstantinos DonasKonstantinos Donas
Konstantinos Donas
UHUlrike Heinrich
Ulrike Heinrich
Korosoglou GrigoriosKorosoglou Grigorios
Korosoglou Grigorios
Many patients with peripheral arterial disease (PAD) exhibit undiagnosed obstructive coronary artery disease. We aim to identify the patients with lifestyle limiting claudication due to PAD and without cardiac symptoms, requiring coronary revascularization based on high-sensitive troponin T (hsTnT) values. We assessed hsTnT in consecutive patients referred for elective endovascular treatment due to claudication [Rutherford categories (RC) 2 & 3] between January 2018 and December 2021. Diagnostic work-up by non-invasive imaging and, if required, cardiac catheterization was performed according to clinical data, ECG findings and baseline hsTnT. The occurrence of cardiac death, myocardial infarction or urgent revascularization during follow-up was the primary endpoint. Of 346 patients, 14 (4.0%) exhibited elevated hsTnT ≥ 14 ng/L, including 7 (2.0%) with acute myocardial injury by serial hsTnT sampling. Coronary revascularization by percutaneous coronary intervention was necessary in 6 of 332 (1.5%) patients with normal versus nine of 14 (64.3%) patients with elevated hsTnT (p < 0.001). During 2.4 ± 1.4 years of follow-up, 20 of 286 (7.0%) patients with normal versus four of 13 (30.8%) with elevated hsTnT at baseline reached the composite primary endpoint (p = 0.03 by log-rank test). In conclusion, elevated troponins in cardiac asymptomatic patients with claudication modify subsequent cardiac management and may increase the need for closer surveillance and more aggressive conservative management in polyvascular disease.