Internal medicine at the Priora International Medical Center covers the entire spectrum of diseases of internal organs with detailed diagnostics, prevention and targeted treatment. Our internists and subspecialists guide the patient from the first interview and collection of anamnesis, through modern examinations, to a clear therapeutic plan and controls.
We place special emphasis on four areas: cardiology, gastroenterology, pulmonology and obesity treatment – with a multidisciplinary team, advanced equipment and a warm, safe approach.
Internal Medicine – Leading Team
Internal Medicine – Leading Team
Assoc. Prof. Prim. Dr. Sc. Aleksandar Kibel, MD – Head of Internal Medicine and Cardiology
Specialist in internal medicine and subspecialist in cardiology, head of internal medicine and cardiology at the Priora International Medical Center and head of the Scientific Unit for Medical Research. He gained many years of experience at the Osijek Clinical Hospital Center, especially at the Department of Cardiovascular Diseases, where he led numerous clinical and scientific projects.
Dr. Kibel received his PhD in 2014 with a focus on cardiovascular physiology and pathophysiology, and has furthered his knowledge at numerous international institutions in Germany, the USA, Spain, Cyprus and Thailand. He is the author and co-author of scientific papers published in international journals, the editor of professional publications and book chapters, and an active lecturer at the Faculty of Medicine and the Faculty of Dental Medicine and Health in Osijek.
As a professor and researcher, he leads several scientific projects and mentors young doctors and doctoral students. At the Priora International Medical Center, he applies modern diagnostic and therapeutic approaches with a special emphasis on prevention, early diagnosis and personalized treatment of cardiovascular diseases, thereby connecting science and clinical practice for the benefit of patients.
Dr. Matej Plažanin, MD – specialist in internal medicine, subspecialist in gastroenterology
He completed his secondary education at the Natural Sciences and Mathematics High School in Našice (1993–1997), after which he enrolled at the Faculty of Medicine of the Josip Juraj Strossmayer University in Osijek, where he graduated in 2005. He gained his first clinical experience during an internship at the General County Hospital in Našice (2005–2006).
He began his specialization in internal medicine in 2006 and completed it in 2011, working at the Clinical Hospital Center Osijek and the Sveti Duh Clinical Hospital in Zagreb. From 2011 to 2015, he worked as a specialist in internal medicine at the General County Hospital Našice, where he further developed his interest and expertise in the field of gastroenterology. Since 2023, he has worked at the Polyclinic “Slavonija” in Osijek, providing specialized care in the fields of internal medicine, gastroenterology and hepatology.
From June 2025, Dr. Plažanin will start working at the International Medical Center Priora, where he will work as a specialist gastroenterologist in the gastroenterology outpatient clinic, providing highly specialized diagnostics and treatment of diseases of the digestive system.
Zlatko Majić, MD – specialist in internal and emergency medicine, subspecialist in pulmonology
He completed his medical studies at the Faculty of Medicine, University of Tuzla, and his specialist examination at the Faculty of Medicine, University of Zagreb, as well as a subspecialization in pulmonology. During his education, he focused on clinical work, diagnostics, and therapeutic procedures in the field of respiratory diseases.
He worked as an internist and pulmonologist at the Special Hospital for Pulmonary Diseases and TB Klenovnik, and then at the Clinical Hospital Center Osijek, where he also served as the head of the Unified Emergency Hospital and the Department of Pulmonology and Intensive Care of Internal Medicine Patients. In his work, he devoted significant attention to the organization of health care and the improvement of treatment procedures for patients with acute and chronic respiratory diseases.
He completed several postgraduate courses and actively participated in numerous domestic and international scientific and professional conferences in the field of pulmonology, where he followed the latest medical trends and applied them in everyday practice.
Cardiology – from prevention to regular treatment
Cardiology at the Priora International Medical Center deals with disorders of the heart and blood vessels: coronary disease (angina, heart attack), heart failure, arrhythmias, hypertension, valve diseases, congenital heart diseases, thromboembolic diseases, aneurysms, myocarditis/pericarditis/endocarditis, etc.
Prevention and screening of cardiovascular risks
- risk assessment (blood pressure, lipids, glucose, BMI/waist circumference, family history)
- intervention plan (lifestyle, pharmacotherapy, control intervals)
Diagnostic
- ECG, heart ultrasound (echocardiography)
- Holter ECG / Holter blood pressure
- laboratory, load test according to indication
- Ultrasound of blood vessels (if necessary)
Treatments and monitoring
- pharmacotherapy according to guidelines, titrations
- education and control plan
- coordination with other subspecialties (e.g. obesity, apnea, gastro-drug interactions)
Gastroenterology – endoscopic precision and safe therapy
Gastroenterology covers diseases of the esophagus, stomach, duodenum, intestines, liver, biliary system and pancreas. Symptoms that require treatment in gastroenterology include abdominal pain, changes in bowel habits, bleeding, anemia, unexplained fatigue, heartburn, and weight loss.
Services and searches
- specialist and check-ups, second opinion
- gastroscopy, colonoscopy, rectoscopy (with the possibility of general anesthesia)
- polypectomy and biopsies
- urea breath test (H. pylori)
Conditions we diagnose and monitor
- GERD, ulcer disease, gastritis (H. pylori)
- IBD: Crohn’s, ulcerative colitis
- polyps and precancers, early cancers
- functional disorders (IBS)
- hepatology (steatosis, hepatitis, cirrhosis), diseases of the biliary system and pancreas
Pulmonology – free breathing and quality of life
Pulmonology deals with acute and chronic respiratory conditions: COPD, emphysema, asthma, infections, interstitial diseases, oncological pulmonology, sleep disorders (e.g. suspected apnea) – with the goal of early diagnosis and stable control.
Diagnostics and procedures
- spirometry, pulse oximetry, X-ray/CT as indicated
- allergological guidance as needed
- inhalation and systemic therapy plan, education on inhalation technique
Monitoring program
- check-ups and therapy adjustments
- action plan for exacerbations
- counseling (smoking, environmental factors, vaccinations)
Obesity treatment – medical, nutritional and cardiometabolic approach
Obesity is a chronic, multifactorial disease associated with hypertension, diabetes, dyslipidemia, sleep apnea, fatty liver, and cardiovascular events.
At the Priora International Medical Center, we implement a multidisciplinary program:
Assessment and plan
- history, laboratory, risk assessment (cardiometabolic profile)
- analysis of dietary and lifestyle habits, sleep and stress
Interventions
- structured nutritional strategies and physical activity plan
- pharmacotherapy for indications (according to guidelines)
- treatment of comorbidities (hypertension, DM2, hyperlipidemia)
- if necessary, including psychological support and/or surgical evaluation (bariatric) in collaboration with partners
Monitoring and maintenance
- regular check-ups (weight, waist circumference, laboratory)
- weight regain prevention and education
What does the patient journey look like in internal medicine?
First examination by an internist
Detailed medical history (personal/family), examination and initial tests.
Targeted diagnostics
Referral to a cardiologist/gastroenterologist/pulmonologist; additional searches.
Therapy plan
Medications, procedures, habit changes – clearly explained.
Controls and prevention
Monitoring plan and reminders; quick therapy adjustments.
Schedule an appointment at the Department of Internal Medicine and receive a personalized care plan.
Why do patients choose IMC Priora?
- Experienced team (Kibel – cardiology; Plažanin – gastroenterology; Majić – pulmonology) and coordination with internal medicine.
- Modern diagnostics and minimally invasive procedures (endoscopy with general anesthesia; advanced cardiological and respiratory examinations).
- Individualized plans and clear communication.
- Continuity of care – from prevention to long-term control and education.
Internal medicine – read more
- Cardiology – overview of services and prevention
- Gastroenterology – endoscopic diagnostics
- Pulmonology – diagnostics and treatment
- Gastroscopy / Colonoscopy / Rectoscopy
- About doctors
Ordering and contact International Medical Center Priora
We are at your disposal to review the price list and organize your arrival. Our team will help with appointments, preoperative preparation, accommodation and postoperative care.
Contact us to book an appointment via our website or by calling our phone number +385 227 400
