Abdullah Yıldırım

Dr. Abdullah Yıldırım

orcid

Research Focus & Metrics

Academic Career Length

11Years (2016-Present)

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

Representative Publications

View All Publications
4 June 2025 in Polish Heart Journal
Verified
Journal Article
Open access
PDF file
AYAbdullah Yıldırım
Abdullah Yıldırım
OGOmer Genc
Omer Genc
MEMert Evlice
Mert Evlice
EPEmre Pacaci
Emre Pacaci
ESEmre Sezici
Emre Sezici
IKIbrahim Halil Kurt
Ibrahim Halil Kurt
WHAT'S NEW? This study demonstrates the safety and efficiency of routine left ventricular (LV) guidewire pacing during transcatheter aortic valve replacement. Unlike conventional right ventricular pacing, LV pacing eliminates the need for additional venous access, thereby reducing vascular complications, avoiding lead-related issues, and lowering the risk of procedure-related pericardial complications such as effusion and tamponade. It was evaluated across a broad spectrum of patients, including those treated with balloon-expandable or self-expandable valves and via transfemoral or transaxillary access. LV pacing significantly reduced procedure time and radiation exposure. These findings support the integration of routine LV pacing into

14 October 2024 in European Journal of Clinical Investigation
Verified
Journal Article
Closed access
ÖGÖmer Genç
Ömer Genç
AYAbdullah Yıldırım
Abdullah Yıldırım
AEAslan Erdoğan
Aslan Erdoğan
EIErsin Ibisoglu
Ersin Ibisoglu
YGYeliz Guler
Yeliz Guler
IKIbrahim H. Kurt
Ibrahim H. Kurt

1 August 2025 in Medicine
Verified
Journal Article
Open access
DODerya Ozdogru
Derya Ozdogru
AYAbdullah Yıldırım
Abdullah Yıldırım
GYGulcin Yenice
Gulcin Yenice
OUOnur kadir Uysal
Onur kadir Uysal
IOIlker Ozturk
Ilker Ozturk
ZAZulfikar Arlier
Zulfikar Arlier
Endovascular treatment (EVT) is the treatment method for acute ischemic stroke (AIS) caused by large vessel occlusion. Contrast-induced acute kidney injury (CI-AKI) is a relatively common complication. In this study, we aimed to investigate the incidence and possible risk factors of CI-AKI including systemic inflammation response index (SIRI) and systemic immune inflammation index (SII) in patients undergoing mechanical thrombectomy. We retrospectively analyzed patients who underwent EVT for acute cerebral large vessel occlusion between January 1, 2021, and March 31, 2024. Before the intervention, blood was drawn from the antecubital vein and collected in the appropriate tubes. Serum levels of neutrophils, lymphocytes, platelets, hemoglobin, CRP, and albumin were measured, alongside lipid profiles and liver and kidney function parameters. An increase in serum creatinine of 0.5 mg/dL or more than 25% in the measurements 48 to 72 hours after EVT compared to before was defined as CI-AKI. SII was calculated with the formula of: peripheral (platelet count × neutrophil count)/ lymphocyte count; SIRI was calculated with the formula of: (neutrophil count × monocyte count)/ lymphocyte count. Their predictive value for CI-AKI occurrence was compared. CI-AKI was detected in 54 (19%) of the 281 patients included in the study. In terms of clinical parameters, baseline NIHSS, postthrombectomy, cerebral edema, hemorrhagic transformation, recanalization time, discharge mRS and contrast amount were significantly higher in patients with CI-AKI. SII exhibited the highest discriminative performance in predicting CI-AKI in patients undergoing mechanical thrombectomy, with a threshold of > 1784 (AUC = 0.710, 95% CI: 0.631–0.788, P < .001, sensitivity 42.6%, specificity 89.0%) followed by SIRI (AUC = 0.652, 95% CI: 0.576–0.728, P < .001, sensitivity 88.9%, specificity 37.9%). SII and SIRI were found to be significantly higher in patients with CI-AKI. These scores may be new promising low-grade inflammatory indicators for predicting CI-AKI development.

12 October 2022 in Acta Cardiologica
Verified
Journal Article
Closed access
MKMehmet Kış
Mehmet Kış
YDYasemin Doğan
Yasemin Doğan
AYAbdullah Yıldırım
Abdullah Yıldırım
TGTuncay Güzel
Tuncay Güzel
LBLütfü Bekar
Lütfü Bekar
LCLVH-TR Study Collaborates
LVH-TR Study Collaborates
Left ventricular hypertrophy (LVH) is potentially modifiable cardiovascular risk factor often overlooked in clinical practice. For this reason, we planned to LVH-TR (Left Ventricular Hypertrophy in Turkish Population) trial to determine the aetiological causes and demographic characteristics of LVH patients. Our study was a multicentre, national, observational study and included 886 patients who applied to the cardiology clinics in 22 centres between February 2020 and August 2021. In the initial evaluation, the Fabry disease (FD) and cardiac amyloidosis (CA) algorithm was followed in patients whose definitive etiologic cause(s) could not be identified. The most common aetiological causes of LVH in our study were hypertension with a rate of 56.6%, heart valve disease with 8.2%, and hypertrophic cardiomyopathy with 7.5%. Athlete’s heart was detected in eight patients, LV non-compaction was detected in four patients. The rate of LVH of unknown cause was 18.8%. FD was suspected in 143 patients, and CA was suspected in 16 patients. There were 43 (4.85%) patients with low α-galactosidase A enzyme levels. GLA gene mutation analysis was positive in 1.58% of all patients, and these patients were diagnosed with FD, and 15 (1.69%) patients were diagnosed with CA by endomyocardial biopsy method. In the aetiology of LVH, the rate of LVH of unknown cause was high. FD and CA should be considered primarily in this patient group. Early diagnosis of the disease by following the schemes leading to FD and CA was essential in starting treatment before the progression of the disease.

2 September 2020 in Journal of Arrhythmia
Verified
Journal Article
Open access
PDF file
YIYahya Kemal İçEn
Yahya Kemal İçEn
HKHasan Koca
Hasan Koca
HSHilmi Erdem Sümbül
Hilmi Erdem Sümbül
AYArafat Yıldırım
Arafat Yıldırım
FKFadime Koca
Fadime Koca
MKMevlüt Koç
Mevlüt Koç
Background: The coarse F waves on the 12‐lead surface electrocardiogram (ECG) in patients with atrial fibrillation (AF) are known as atrial viability and contractility indicator. Our aim in this study was to investigate the effect of coarse F wave on thromboembolism in patients with permanent AF.Methods: In our study, 328 patients with permanent AF were included. Routine laboratory, echocardiographic and electrocardiographic parameters were examined. Cerebrovascular event (CVE) or acute artery occlusion was considered a thromboembolic event.Results: In our study, 46 (14.0%) of the patients were found to have thromboembolic events and 282 (86%) of them were found without thromboembolic events. In the group with thromboembolic event, the number of patients with hypertension (HT) (P < .001) and history of coronary artery disease (P = .003) and elderly patients (P < .001) was significantly higher and warfarin use was significantly lower (P = .025). In the group of patients without thromboembolic events, the number of patients with a coarse F wave in surface ECG was significantly lower (P = .001). Age (OR: 1.105, 95% CI: 1.066‐1.145, P < .001), HT (OR: 2.831, 95% CI: 1.266‐6.331, P = .011), and coarse F wave (OR: 0.290, 95% CI: 0.126‐ 0.670, P = .004) were determined as independent variables for thromboembolic events.Conclusion: Coarse F wave in 12‐lead surface ECG in patients with permanent AF may be associated with good prognosis.

27 October 2024 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
OUOnur kadir Uysal
Onur kadir Uysal
DODerya Ozdogru
Derya Ozdogru
AYAbdullah Yıldırım
Abdullah Yıldırım
IOIlker Ozturk
Ilker Ozturk
GTGuluzar TRAS
Guluzar TRAS
ZAZulfikar Arlier
Zulfikar Arlier
Background/Objectives: The Naples prognostic score (NPS), reflecting inflammation and nutritional status, has prognostic value, especially in cancer. This study evaluated its ability to predict in-hospital mortality in acute ischemic stroke (AIS) patients undergoing endovascular treatment (EVT). Methods: We retrospectively studied 244 patients with AIS who were admitted between April 2020 and December 2023. Patients were included if they presented within 6 h of symptom onset with evidence of intracranial proximal arterial occlusion. The EVT was performed using aspiration catheters, stent retrievers, or both. The NPS was calculated based on the neutrophil–lymphocyte ratio, lymphocyte–monocyte ratio, and albumin and total cholesterol levels. Results: We found a significant association between higher NPS scores and in-hospital mortality. Patients with a high NPS (3 or 4) had a mortality rate of 41.6% compared to 21.0% in the low-NPS group (0, 1, or 2). The full model incorporating NPS showed superior predictive ability for in-hospital mortality compared with the baseline model (areas under the curve 0.881 vs. 0.808). A receiver-operating characteristic analysis at a cutoff of >2.5 for the NPS showed a sensitivity of 86.6% and specificity of 41.9%. This study demonstrated that incorporating the NPS into the predictive model improved the accuracy and calibration for predicting in-hospital mortality. A decision curve analysis showed the net benefit of using the full model incorporating NPS over the baseline model, emphasizing its potential clinical application in prognostication. Conclusions: NPS is a reliable predictor of in-hospital mortality in AIS patients undergoing EVT. Incorporating NPS into clinical practice could help to identify high-risk patients and improve outcomes through tailored interventions.