Minimally invasive cardiac surgery (MICS) is a modern approach that offers significant benefits through smaller surgical incisions. This technique reduces surgical trauma while improving patient comfort, recovery time, and overall outcomes. By providing less pain, faster recovery, and aesthetic results, it constitutes a strong alternative to traditional open surgery. MICS is the general term for surgical techniques that aim to reach the heart using smaller incisions compared to classical surgery. The goal is to reduce surgical trauma, decrease pain and blood loss, accelerate recovery, and improve aesthetic outcomes. In most cases, the breastbone (sternum) is not fully cut; the heart is accessed through a small section or between the ribs.

Minimal invasive cardiac surgeries are a type of open-heart surgery. Some of our colleagues present these operations to patients as closed-heart surgery. The terms closed-heart surgery or closed bypass are incorrect.

What is the Difference from the Classical Method?

Incision Size: While classical median sternotomy is 15–20 cm, MICS uses small incisions between 4–6 cm.
Pain and Analgesic Need: Less tissue damage generally means less pain.
Blood Loss/Transfusion: Small incisions and gentle dissection can reduce blood loss.
Hospital Stay and Recovery: Shorter hospitalization and faster return to work/activity in suitable patients.
Aesthetics: Smaller and less visible scars; cosmetic satisfaction is higher.

Main Incisions and Approaches

MICS can be performed through different access routes; the safest and most effective route is chosen based on the case.

Mini-Sternotomy

The heart is accessed through a short incision in only the upper or lower part of the breastbone. It is particularly preferred for aortic valve surgeries. Not fully cutting the bone provides advantages in terms of stability and recovery.

Mini-Thoracotomy (Small right/left intercostal incision)

The heart is accessed between the ribs through a 3–5 cm incision, usually over the right inframammary line, without cutting the breastbone at all. Mitral/tricuspid valve, ASD/PFO closure, and some AF ablation surgeries can be performed this way.

Fully Endoscopic and Robotic-Assisted Techniques

In the fully endoscopic approach, a camera and several small ports are used. Robotic systems provide micro-precision by magnifying hand movements and filtering tremors.

Which Surgeries Can Be Performed with MICS?

Many heart surgeries can be successfully performed with minimal invasive methods; examples are given in the subheadings below.

Mitral Valve Repair/Replacement (MIMVS)

Excellent visualization and suture control are achieved with right mini-thoracotomy. If valve repair is possible, it is generally preferred over replacement.

Aortic Valve Replacement (Mini-AVR)

Safe access to the aortic valve is provided with mini-sternotomy. In suitable cases, blood loss and ICU stay may be reduced.

Coronary Bypass: MIDCAB / TECAB

MIDCAB: LIMA-LAD anastomosis through a small incision below the left breast. TECAB: Fully endoscopic/robotic bypass; may be considered in selected cases.

ASD/PFO Closure and Other Congenital Corrections

Patch closure or direct suturing is possible with small incisions. It offers advantages in terms of cosmetics and pain management.

Rhythm Surgery (AF Ablation)

In selected atrial fibrillation cases, ablation lines can be applied with MICS; it can be combined with mitral procedures.

Technical Foundations of the Surgery

Bypass setup, clamping methods, and imaging-instrument selection are the main factors determining safety and effectiveness.

Heart-Lung Machine and Cannulation Options

Femoral cannulation (via groin vessels) or central cannulation (aorta/right atrium) may be preferred. The choice is made based on vessel structure, type of surgery, and safety parameters.

Clamp/Joint Methods (Endoaortic Balloon vs. External Clamp)

The endoaortic balloon clamp is placed into the aorta via a catheter; it is useful in mini-thoracotomy cases. Alternatively, an external clamp can be applied through a tiny incision.

Imaging and Instruments

High-resolution endoscopic camera, long-shafted suturing/holding instruments, and CO₂ insufflation provide clear vision and safe suturing. TEE (transesophageal echo) provides real-time guidance during anesthesia.

Patient Selection: Who is Suitable?

Suitability is evaluated based on specific pathology, anatomical conditions, and general health status.

Eligibility Criteria

Isolated mitral/aortic valve disease, selected single-vessel LAD disease, ASD/PFO, certain AF cases; suitable femoral vessel caliber and favorable aortic structure.

Relative Contraindications

Extensive vascular calcification (porcelain aorta), severe peripheral artery disease, multi-vessel coronary disease, advanced thoracic deformities/adhesions, acute hemodynamic instability.

Advantages and Potential Risks

Advantages: small incision, less pain, less blood loss, shorter hospital stay, rapid mobilization, aesthetic results.
Risks: bleeding, infection, arrhythmia, stroke, lung/kidney problems; conversion to classical approach for safety if necessary.

Generally, heart surgeries performed through small incisions take longer. One of the most important factors determining the risk in heart surgeries is the duration the patient is connected to the heart-lung machine. The longer this period, the higher the risk of surgery. Therefore, if the patient’s general condition and heart functions cannot tolerate this increased duration in minimal invasive cardiac surgeries, performing these operations is detrimental to the patient.

Recovery Process and Timeline

First 24–48 hours in intensive care, pain control, and early mobilization; walking distances increase in 3–7 days; return to light activities in 1–3 weeks; incision healing completed in 4–6 weeks. The plan is determined individually by the surgeon.

Pre-Surgery Preparation Checklist

Imaging (ECHO/CT/angiography), femoral vessel evaluation; medication adjustments (anticoagulants), breathing exercises and smoking cessation; discharge plan and first week at home arrangements; prepare your questions in writing.

What to Look for When Choosing a Center and Surgeon?

Case volume and experience, team harmony (surgeon-anesthesia-perfusion-intensive care), technology park (endoscopic/robotic devices, intraoperative TEE), follow-up protocol (pain, infection prevention, rehabilitation).

Summary: Frequently Asked Questions (FAQ)

Is the heart always stopped in MICS?

It depends on the procedure. In valve surgeries, bypass is often required, and the heart is stopped; however, some bypass procedures can be performed on a beating heart.

Robotic or endoscopic?

Both are minimally invasive. Robotic systems offer the advantage of motion scaling and 3D depth, while endoscopic methods are performed with cameras and special instruments.

Is the pain less?

Generally, yes; thanks to small incisions and less tissue trauma, the need for postoperative pain medication may decrease compared to classical surgery.

Are the results as reliable as classical heart surgeries?

When performed in a suitable patient and an experienced center, the results of minimal invasive surgery are comparable to classical methods.

Do you have questions about Great Recovery with Small Incisions?

You can find the answers to the 25 most frequently asked questions about the details of minimal invasive cardiac surgery (MICS), who it can be applied to, and its advantages on our special page.

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Conclusion

Minimal Invasive Cardiac Surgery, when applied to the right patient and with the correct indication, is an effective approach that can provide great recovery with small incisions. The decision on which method is most suitable for you should be made with an expert team that holistically evaluates your clinical condition.

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Minimal Invasive Cardiac Surgery – Great Recovery with Small Incisions