Mehmet Akif Onalan

Dr. Mehmet Akif Onalan

orcid

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

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

Representative Publications

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22 November 2020 in Journal of Cardiac Surgery
Verified
Journal Article
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MOMehmet Akif Onalan
Mehmet Akif Onalan
BTBahar Temur
Bahar Temur
SASelim Aydın
Selim Aydın
SBSerdar Basgoze
Serdar Basgoze
FGFusun Guzelmeric
Fusun Guzelmeric
EEErsin Erek
Ersin Erek

1 October 2021 in Cardiology in the Young
Verified
Journal Article
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SBSerdar Basgoze
Serdar Basgoze
BTBahar Temur
Bahar Temur
OGOsman Guvenc
Osman Guvenc
SASelim Aydin
Selim Aydin
FGFusun Guzelmeric
Fusun Guzelmeric
EEErsin Erek
Ersin Erek
Objective: Laterality anomalies are almost always associated with severe cardiac anomalies. Demographic properties, type of the procedures, associated anomalies, and early and mid-term prognosis of four types of laterality anomalies were analysed.Methods: A total of 64 consecutive patients with laterality anomalies were enrolled between July 2014 and July 2020. We grouped the patients as situs solitus dextrocardia (SSD) (n = 12; 18.7%); situs inversus (SI) (n = 16; 25%); right atrial isomerism (RAI) (n = 29; 45.3%); and left atrial isomerism (LAI) (n = 7; 10.9%). TAPVC was only present in the RAI group (31%). Incidence of mitral or tricuspid atresia was higher in the SSD group (25%). All the patients were followed up with a mean of 19.06 ± 17.6 (0.1–72) months.Results: Early postoperative mortality was 17 patients, among 107 procedures (15.8%). Twelve patients were in the neonatal period. All ten patients survived after isolated ductal stenting. Fourteen of the deaths were in the RAI group (48.3%). The 3-year survival rates were 85% in LAI, 78.7% in SI, 55.8% in SSD, and 38% in RAI groups. According to the multivariable Cox regression model, mechanical ventilation, kidney injury, RAI, and complex surgery in the neonatal period were independent risk factors for early mortality.Conclusion: Laterality anomalies are one of the most challenging patients who commonly had univentricular physiology. The most prevalent anomaly was RAI, and RAI had the worst outcome and survival. Ductal stent is an acceptable first intervention during the neonatal period in suitable patients. Complex procedures may carry a high risk of death in the neonatal period.

11 June 2021 in Cardiology in the Young
Verified
Journal Article
Closed access
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MCMurat Cicek
Murat Cicek
MOMehmet Akif Onalan
Mehmet Akif Onalan
NYNurgul Yurtseven
Nurgul Yurtseven
Coronavirus disease 2019 causes respiratory and systemic disease and has led to a sudden epidemic affecting people of all ages. Patients with congenital heart disease represent a high-risk population. In this article, we present a newborn who required extracorporeal membrane oxygenation support for acute respiratory failure in the early postoperative period due to exposure to severe acute respiratory syndrome coronavirus 2 after aortic arch repair and ventricular septal defect closure. To the best of our knowledge, this patient represents the first neonatal case of severe acute respiratory syndrome coronavirus 2 infection after congenital heart surgery and is the youngest patient to need extracorporeal membrane oxygenation support.

3 September 2020 in Cardiology in the Young
Verified
Journal Article
Closed access
PDF file
MOMehmet Akif Onalan
Mehmet Akif Onalan
EOEnder Odemis
Ender Odemis
MSMurat Saygi
Murat Saygi
BTBahar Temur
Bahar Temur
SASelim Aydin
Selim Aydin
EEErsin Erek
Ersin Erek
Objective: We aimed to determine the early and midterm outcomes of ductal stenting in neonates with ductal-dependent pulmonary blood flow.Methods: Between January, 2014 and July, 2018, 102 patients who underwent 115 cardiac catheterisation procedures for ductal stent implantation in our department were retrospectively reviewed. The age of the neonates ranged from 3 to 30 days (median: 11 days) and their weights ranged from 1.8 to 5.8 kg (mean, 2.8 ± 0.53 kg). Fifty-two patients had functional single ventricle and 50 had biventricular physiology. Thirty-one patients’ weights were <2,500 g (30.3%). The patent ductus arteriosus was vertical in 60 patients (58.8%). The mean ductal length was 12.4 ± 4.1 mm (range, 7.8–23 mm), and the mean narrowest ductal diameter was 2.1 ± 0.7 mm (range, 1.2–3.4 mm).Results: The technical success rate was 85.2%. Procedure-related mortality occurred in three patients (2.9%). After the procedure, the aortic oxygen saturation increased from a mean of 73.1 ± 6.2% to a mean of 90.4 ± 4.3% (p < 0.001), and the ductus diameter increased from a mean of 2.1 ± 0.7 mm to a mean of 4.2 ± 0.9 mm (p < 0.001). Either transcatheter or surgical reinterventions were required in 35 patients (34.3%) during the follow-up period after a median of 101 days (2–356 days). Thirty-three patients (32.3%) were bridged to surgical repair after a median of 288 days (163–650 days). The median duration of palliation with ductal stents was 210 days (range, 2–525 days).Conclusion: Ductus arteriosus stenting may be a reasonable and effective alternative to surgery for the initial palliation procedure in neonates with ductus-dependent pulmonary flow.

4 May 2021 in Cardiology in the Young
Verified
Journal Article
Closed access
PDF file
BTBahar Temur
Bahar Temur
IEİsMet E Emre
İsMet E Emre
SASelim Aydın
Selim Aydın
MOMehmet Akif Onalan
Mehmet Akif Onalan
SBSerdar Başgöze
Serdar Başgöze
EEErsin Erek
Ersin Erek
Objective: After congenital heart surgery, some patients may need long-term mechanical ventilation because of chronic respiratory failure. In this study, we analysed outcomes of the patients who need tracheostomy and home mechanical ventilation.Methods: Amongst 1343 patients who underwent congenital heart surgery between January, 2014 and June, 2018, 45 needed tracheostomy and HMV. The median age of these patients was 6.4 months (12 days–6.5 years). Nineteen patients underwent palliation while 26 patients underwent total repair. Post-operative diaphragm plication was performed in five patients (11%). Median duration of mechanical ventilation before tracheostomy was 32 days (8–154 days). The patients were followed up with their home ventilators in ward and at home. Mean follow-up time was 36.24 ± 11.61 months.Results: The median duration of ICU stay after tracheostomy was 27 days (range 2–93 days). Follow-up time in ward was median 30 days (2–156 days). A total of 12 patients (26.6%) were separated from the ventilator and underwent decannulation during hospital stay. Thirty-two patients (71.1%) were discharged home with home ventilator support. Of them, 15 patients (46.9%) were separated from the respiratory support in median of 6 weeks (1 week–11 months) and decannulations were performed. Total mortality was 31.1%. in which four patients are still HMV dependent. There was no significant difference for decannulation between total repair and palliation patients.Conclusion: HMV via tracheostomy is a useful option for the treatment of children who are dependent on long-term ventilation after congenital heart surgery although there are potential risks.

30 November 2021 in World Journal for Pediatric and Congenital Heart Surgery
Verified
Journal Article
Closed access
PDF file
MOMehmet Akif Onalan
Mehmet Akif Onalan
BTBahar Temur
Bahar Temur
SASelim Aydın
Selim Aydın
DSDilek Suzan
Dilek Suzan
IDIbrahim H. Demir
Ibrahim H. Demir
EEErsin Erek
Ersin Erek
Objectives: Interrupted aortic arch (IAA) includes a broad spectrum of associated anomalies. In this study, we present our surgical management and patient-specific decisions regarding IAA anomalies with early- and mid-term outcomes. Methods: The medical records of 25 patients undergoing IAA repair between 2014 and 2019 were retrospectively reviewed. Sixteen patients had type B (64%) interruptions, 7 had type A (28%) interruptions, and 2 had type C (8%) interruptions. Fourteen patients had an isolated ventricular septal defect, and 3 of them had associated left ventricular outflow tract obstruction. Other associated anomalies were functional single ventricle (n = 5), Taussig–Bing anomaly (n = 3), aortopulmonary window (n = 1), multiple ventricular septal defects (n = 1), and truncus arteriosus with dextrocardia (n = 1). The initial operation age was 17.2 ± 14 (range: 1 - 60) days. Results: Single-stage total repair was performed for 15 patients. Six patients underwent aortic arch repair and pulmonary artery banding. Four patients with left ventricular outflow tract obstruction or who were premature underwent the hybrid procedure. The aortic arch repair was performed in 16 cases (64%) by the anterior patch augmentation technique, in 3 cases (12%) by the reverse left subclavian artery flap technique, and in 3 cases (12%) by direct end-to-end anastomosis. Postoperative early mortality occurred in 4 (16%) patients, and sternal closure was delayed in 13 (52%) patients. Three patients who underwent a hybrid procedure due to left ventricular outflow tract obstruction underwent biventricular repair 8 to 13 months later. Eight patients (38%) required reintervention due to arch restenosis during the follow-up period. The mean follow-up was 37.1 ± 21.7 months. Conclusion: Planning surgical treatment according to the characteristics of the patients and accompanying anomalies may improve the results.