• Appointments | Patient Portal


Northwest Indiana Medical Group (NEW)
  • Quick Links
    • For Patients
      • For Patients

        • Patients & Visitors
        • Award Nominations
        • Accepted Insurance
        • All Appointments
        • Billing Information
        • Coordinated Care
        • Helpful Information
        • Medicare Helpline
        • Patient Forms
        • Patient Portal
        • Prescription Refills
        • Telehealth Info
          • Services
            • Services

              • View All Services
              • Audiology
              • Bariatrics
              • Cardiac Electrophysiology
              • Cardiology
              • Cardiothoracic Surgery
              • Gastroenterology
              • General Surgery
              • Neurology
              • OB/GYN
              • Oncology & Hematology
              • Orthopedics
              • Pediatrics
              • Primary Care
              • Pulmonary & Critical Care
              • Sleep Medicine
              • Urology
                • Providers
                • Locations
                • About
                  • About

                    • About Us
                    • Affiliations
                    • Newsroom
                    • Organized Health Care Arrangement Status
                      • Contact
                      • Northwest Health
                      • Make an Appointment
                      • Patient Portal
                      • Careers
                      Home/Services/Cardiothoracic Surgery
                      eNewsletter Redirect
                      Notice of Non-Discrimination
                      About Us
                      Contact Us
                      For Patients
                      Locations
                      Providers
                      Services
                      Audiology
                      Bariatrics
                      Cardiac Electrophysiology
                      Cardiology
                      Cardiothoracic Surgery
                      Gastroenterology
                      General Surgery
                      Neurology
                      OB/GYN
                      Oncology & Hematology
                      Orthopedics
                      Pediatrics
                      Primary Care
                      Pulmonary & Critical Care
                      Sleep Medicine
                      Urology
                      PPS - Webpages
                      • advertisement

                        Locations

                        Ready for your visit? Click here to find out the location of and directions to our office.

                        Learn More
                      • advertisement

                        Services

                        Need more information? Click here to learn more about the services we offer.

                        Learn More

                      Cardiothoracic Surgery


                      Click here to view cardiothoracic surgeons.

                      View Surgeons

                      Surgeries on heart valves or arteries can treat blockages, leaks or infections. Implants of mechanical devices or stents also require heart surgery. While traditional heart surgeries involve incisions along the length of the sternum, other options for patients meeting certain criteria include a partial incision along the sternum, small-incision surgeries and surgeries performed through endoscopy.

                      Coronary Artery Bypass Grafting (CABG)

                      This is the most common type of heart surgery. Healthy arteries and veins, taken from other parts of the body, are used to bypass blocked arteries. It is performed on people with severe coronary heart diseases (CAD).

                      Valve Repair or Replacement

                      Valve repair or replacement surgery is used to repair the leaflets in the heat if they do not open-up wide enough or if they do not close tightly.

                      Arrhythmia Treatment

                      An arrhythmia is a situation where the heart either beats too fast, too slow or with an irregular rhythm. They are not always dangerous and can be treated with medicines. If medicine is ineffective, surgery is used to place a pacemaker or a defibrillator. Another type of surgery is maze surgery in which new paths are created for the heart's signal to travel through.

                      Thoracic Surgery

                      Most general thoracic surgeries address problems with the lungs or esophagus, such as cancer removal, reflux disorders, tumors, hernias and emphysema. Other areas treated with thoracic surgery include the chest wall and the mediastinum – the area containing the heart, which is located between the lungs. Minimally invasive, small-incision procedures often allow for the diagnosis of problems in the chest cavity's organs, tissues and bones before proceeding to more complicated surgeries.

                      Mediastinoscopy

                      Mediastinoscopy is most commonly used to detect or stage cancer. It is also ordered to detect infection, and to confirm diagnosis of certain conditions and diseases of the respiratory organs

                      VATS (video assisted thoracic surgery)

                      During a video-assisted thoracic surgery procedure, a tiny camera (thoracoscope) and surgical instruments are inserted into your chest through several small incisions. The thoracoscope transmits images of the inside of your chest onto a video monitor. Compared with a traditional open operation (thoracotomy), video-assisted thoracic surgery may result in less pain and shorten recovery time.

                      Thoracotomy

                      Thoracotomy is the process of making an incision into the chest wall (thorax). It allows examination of the condition of the lungs; removal of a lung or part of a lung; removal of a rib; and examination, treatment, or removal of any organs in the chest cavity. Thoracotomy also provides access to the heart, esophagus, diaphragm and the portion of the aorta that passes through the chest cavity.

                      Simsir, Sinan, M.D.
                      Sinan Simsir, M.D.
                      Cardiothoracic Surgery
                      (219) 983-6380
                      Northwest Medical Group - Cardiovascular & Thoracic Surgery
                      85 E. US Highway 6, Suite 310

                      Valparaiso 46383
                      Request An Appointment

                      Northwest Medical Group

                      • ADA Accessibility Policy
                      • Notice of Privacy Practices
                      • Privacy Policy
                      • Change Your Privacy Choices
                      • Terms & Conditions

                      Copyright ©2025. All rights reserved.

                      A medical group of AllianceHealth Oklahoma®

                      Services

                      • Audiology
                      • Bariatrics
                      • Cardiac Electrophysiology
                      • Cardiology
                      • Cardiothoracic Surgery
                      • Gastroenterology
                      • General Surgery
                      • Neurology
                      • OB/GYN
                      • Oncology & Hematology
                      • Orthopedics
                      • Pediatrics
                      • Primary Care
                      • Pulmonary & Critical Care
                      • Sleep Medicine
                      • Urology

                      For Patients

                      • Award Nominations
                      • Accepted Insurance
                      • All Appointments
                      • Billing Information
                      • Coordinated Care
                      • Helpful Information
                      • Medicare Helpline
                      • Patient Forms
                      • Patient Portal
                      • Prescription Refills
                      • Telehealth Info

                      About

                      • Affiliations
                      • Newsroom
                      • Organized Health Care Arrangement Status

                      Notice of Nondiscrimination
                      • English,
                      • አማርኛ,
                      • العربية,
                      • বাংলা,
                      • ျမန္မာဘာသာ,
                      • tsalagi gawonihisdi,
                      • 繁體中文,
                      • Chahta,
                      • Oroomiffa,
                      • Nederlands,
                      • Français,
                      • Kreyòl Ayisyen,
                      • Deutsch,
                      • ગુજરાતી,
                      • हिंदी,
                      • Hmoob,
                      • Igbo asusu,
                      • Ilokano,
                      • Italiano,
                      • 日本語,
                      • 한국어,
                      • Ɓàsɔ́ɔ̀‑wùɖù‑po‑nyɔ̀,
                      • ພາສາລາວ,
                      • Kajin Ṃajōḷ,
                      • ខ្មែរ,
                      • Diné Bizaad,
                      • नेपाली,
                      • Deitsch,
                      • فارسی,
                      • Polski,
                      • Português,
                      • ਪੰਜਾਬੀ,
                      • Română,
                      • Русский,
                      • Gagana fa'a Sāmoa,
                      • Srpsko‑hrvatski,
                      • Español,
                      • ܣܘܼܪܸܬ݂,
                      • Tagalog,
                      • ภาษาไทย,
                      • Türkçe,
                      • Українська,
                      • اُردُو,
                      • Tiếng Việt,
                      • èdè Yorùbá,
                      • עִברִית
                      Primary Care Appointments:
                      888-SAME-DAY
                      Loading... Loading...