Understand when a surgeon may be to blame for injuries or death following a heart bypass surgery in Tampa and what to do to protect your rights

Coronary artery bypass graft (CABG) surgery—often called heart bypass surgery—can be a life-saving procedure for people with severe heart disease. But like any major operation, it carries real risks. Even when your surgeon and medical team do everything right, there’s no guarantee of a perfect outcome. 

Unavoidable complications can happen simply because the procedure is complex and the patient’s condition is serious. However, when preventable errors like surgical mistakes, improper monitoring, or failure to respond to signs of problems lead to serious complications or death, it may be medical malpractice.

In this article, we’ll walk you through the common risks and complications of a CABG surgery, how to tell when something may have gone wrong due to a medical mistake, and what you should do if you suspect malpractice.

If you or a loved one in Florida has questions about an injury or death following heart bypass surgery, the experienced Tampa medical malpractice attorneys at Palmer Lopez are here to help you understand your options and protect your rights. Reach out today to schedule a free consultation.

Is CABG a high-risk surgery?

Yes. Heart bypass surgery is a major procedure, and while many patients recover well, it does carry serious risks. Research suggests that about 5–7% of patients experience complications after surgery, and roughly 2% die during or shortly after the procedure.

The risk isn’t the same for everyone. Factors like age, overall health, and pre-existing medical conditions can make recovery harder or increase the chances of complications. There’s also a slight difference in mortality rates between men and women.

A 2023 study published in JAMA Surgery found that female bypass patients had a 2.8% death rate during or soon after surgery compared to 1.7% for male patients—nearly a 50% higher rate. After adjusting for age and other health factors, that gap narrowed but still remained about 10–20% higher for women.

What are the worst complications of a CABG?

Complications after coronary artery bypass graft surgery can range from temporary setbacks to life-threatening, catastrophic injuries. Some affect the heart itself, while others impact different organs or overall recovery. 

Common serious risks of heart bypass surgery include:

• Heart attack during or soon after surgery, caused by reduced blood flow to the heart muscle
• Stroke if a blood clot or reduced blood flow affects the brain
• Pneumonia, particularly in older patients or those with pre-existing lung conditions
• Kidney failure, which may develop if the stress of surgery damages renal function
• Arrhythmias (irregular heartbeats), which can cause palpitations, dizziness, fainting, or even cardiac arrest
• Severe bleeding requiring a blood transfusion during or after the procedure, which increases the risk of complications like heart failure, arrhythmias, and death
• Infections at the chest incision site or other areas where veins were harvested (like the legs)
• Cognitive issues such as memory loss, confusion, or difficulty concentrating (often called post-operative cognitive dysfunction), which may resolve with time
• Adverse reactions to anesthesia, which may cause breathing or cardiovascular complications

Doctors and nurses should recognize and quickly respond to any warning signs of complications like chest pain, sudden weakness, trouble breathing, fever, or confusion to ensure problems are treated before they cause lasting harm.

How to know if a CABG failed

While many people recover well after heart bypass surgery, sometimes the graft used to bypass a blocked artery doesn’t stay open or function as it should. This is called a graft failure, and it happens in about 33.7% of patients over time.

Signs that your CABG may have failed include:

• Recurring chest pain or pressure (angina) similar to what was experienced before surgery
• Shortness of breath during mild activity or even at rest
• Extreme fatigue that does not improve with rest
• Dizziness, fainting, or lightheadedness, especially during exertion
• Swelling in the legs, ankles, or feet from fluid buildup
• Irregular heartbeat (arrhythmia) or a sensation of fluttering in the chest
• Signs of a heart attack, such as severe chest pain, sweating, nausea, or pain radiating to the arm, neck, or jaw
• Poor wound healing or persistent infection, which may indicate broader circulatory issues

Because some of these symptoms can also occur from other post-surgical complications, it’s critical to seek medical evaluation right away. Early detection of graft failure can sometimes allow for corrective procedures before further heart damage occurs.

What causes bypass graft failure after heart surgery?

Bypass graft failure can happen for several reasons, and the cause often depends on how much time has passed since the surgery:

• Early failure (within the first month). Often caused by blood clots forming inside the graft, technical issues with how the graft was connected, or poor blood flow through the new vessel.
• Intermediate failure (1 month to 1 year). Commonly linked to scar tissue or narrowing (intimal hyperplasia) where the graft joins the coronary artery. This narrowing can reduce or block blood flow over time.
• Late failure (after 1 year). Usually the result of atherosclerosis (plaque buildup) in the graft itself, similar to what caused the original blockage in the patient’s native arteries.

Other factors that can raise the risk of graft failure include:

• Smoking after surgery
• Uncontrolled high blood pressure, high cholesterol, or diabetes
• Graft type (vein grafts generally fail more often than artery grafts)
• Poor overall heart or vessel health
• Infection or inflammation

While graft failures may be unavoidable in some patients even with optimal medical care, in other instances, they can be the direct result of a medical mistake.

When heart bypass surgery goes wrong: When is it a doctor’s mistake?

Generally speaking, the line between an accepted surgical risk and malpractice is crossed when harm is caused by avoidable errors or substandard care. Below are some examples of mistakes during or after cardiac bypass surgery that fall below the accepted standard of care and could be considered medical malpractice:

• Performing surgery on the wrong vessel or making an error in graft placement
• Failing to appropriately monitor vital signs and oxygen levels during surgery or recovery
• Delaying necessary intervention when a patient shows signs of distress
• Using unsanitary techniques that lead to preventable infections
• Failing to diagnose and treat post-surgical complications in a timely manner
• Administering the wrong dosage of anesthesia, missing signs of anesthesia complications, and other anesthesia errors
• Failing to provide medications needed to prevent post-op complications and other medication errors, like administering the wrong medication or dosage 
• Failing to provide proper post-operative care, such as helping the patient get out of bed early, using intermittent pneumatic compression (IPC) cuffs to prevent blood clots, or encouraging the use of an incentive spirometer to prevent pneumonia
• Discharging a patient too soon or without properly addressing warning signs, follow-up care, or ongoing complications after surgery.

If a physician’s negligence directly causes serious injury or death, the patient or their family may have grounds for a medical malpractice claim. 

But surgical mistakes aren’t the only cause of preventable harm. Nursing negligence and hospital negligence can also contribute to poor outcomes after a CABG procedure. 

That’s why it’s important to have a medical malpractice attorney with experience in heart surgery cases review the entire chain of care to determine who may be legally responsible.

Get help from an experienced heart surgery malpractice lawyer in Tampa

Distinguishing between an unavoidable complication and a preventable medical error after heart bypass surgery is rarely simple. It takes an attorney with experience in these types of cases to dig into the details—reviewing surgical and hospital records, analyzing test results, interviewing witnesses, and consulting with leading medical experts to determine whether the standard of care was breached.

At Palmer Lopez, we investigate every angle of your case, from how the surgery was performed to the quality of your post-operative care. If we find evidence that negligence played a role, we build a compelling claim to hold the responsible parties accountable and fight for the compensation you deserve.

If you or a loved one suffered serious health complications or wrongful death after an open heart surgery like cardiac bypass in Florida, our team can help you get answers, understand your legal options, and pursue justice if malpractice occurred.

Learn more by scheduling a free consultation with the experienced Tampa medical malpractice attorneys at Palmer Lopez today.