What is Endocarditis?
Endocarditis is a serious infection of the inner lining of the heart chambers and valves, known as the endocardium. It is usually caused by bacteria or, less commonly, fungi that enter the bloodstream and attach to damaged areas of the heart. Endocarditis can lead to severe complications, including heart valve damage, blood clots, stroke, or even organ failure. It is a medical emergency that requires immediate treatment.

What Causes Endocarditis?
The main cause of endocarditis is an infection that enters the bloodstream and reaches the heart. Several factors can increase the risk of developing endocarditis:

• Bacterial infection – The most common cause of endocarditis is bacteria, particularly Streptococcus and Staphylococcus species. These bacteria can enter the bloodstream through:
  • Dental procedures – Such as teeth cleaning or extractions.
  • Surgical procedures – Including surgery on the heart or other body parts.
  • Intravenous drug use – Sharing needles can introduce bacteria directly into the bloodstream.
  • Infections in other parts of the body – Bacterial infections in the skin, urinary tract, or lungs can spread to the heart.
• Fungal infection – Less commonly, fungal infections can cause endocarditis, particularly in people with weakened immune systems.
• Heart conditions – Pre-existing heart conditions like valvular heart disease, congenital heart defects, or artificial heart valves can make the heart more vulnerable to infection.
• Intravenous catheters or pacemakers – Medical devices that are inserted into veins or the heart can provide a pathway for bacteria to enter the bloodstream.

What Are the Symptoms of Endocarditis?
Symptoms of endocarditis can develop slowly or suddenly, depending on the severity of the infection and the overall health of the individual. Common symptoms include:

• Fever and chills – Often the first signs of infection.
• Fatigue – Feeling unusually tired or weak.
• Shortness of breath – Difficulty breathing or feeling winded during simple activities.
• Heart murmur – A doctor may detect an abnormal heart sound, known as a murmur, during a physical exam.
• Painful joints or muscles – Muscle or joint aches may occur as the infection spreads.
• Swelling – Swelling in the feet, legs, or abdomen can result from heart failure caused by the infection.
• Night sweats – Excessive sweating during sleep.
• Skin changes – Small, red or purple spots under the skin (called petechiae), or on the whites of the eyes, hands, or feet.
• Persistent cough – A cough that doesn’t go away, especially if there is fluid buildup in the lungs.
• Stroke symptoms – In severe cases, a blood clot may travel to the brain, causing sudden weakness, confusion, or difficulty speaking.

How is Endocarditis Diagnosed?
Diagnosing endocarditis requires a combination of tests and exams:

• Medical history and physical exam – Your doctor will ask about any risk factors for endocarditis, including recent medical procedures, heart conditions, or drug use. A physical exam will focus on checking for signs like fever, heart murmur, or skin changes.
• Blood cultures – Blood samples are taken to identify the bacteria or fungi causing the infection. Multiple blood samples are usually drawn over several hours to increase accuracy.
• Echocardiogram – This test uses sound waves to create images of the heart. It helps doctors see if there is an infection on the heart valves or other parts of the heart. An infected heart valve can appear as a growth or abnormal mass on the valve.
• Electrocardiogram (ECG) – An ECG may be used to monitor heart rhythm and identify any abnormal heartbeats.
• Chest X-ray – A chest X-ray can help detect fluid buildup in the lungs or other complications.
• CT or MRI scans – These may be used to check for signs of complications, like abscesses or blood clots.
• Other tests – Additional tests, like urinalysis or liver function tests, may help identify complications related to the infection.

How is Endocarditis Treated?
Treatment for endocarditis typically involves both antibiotics and, in some cases, surgery:

• Antibiotics – Endocarditis is primarily treated with intravenous (IV) antibiotics. The specific antibiotic will depend on the bacteria or fungus identified in blood cultures. Treatment often lasts for several weeks to ensure the infection is fully cleared.
• Antifungal medication – If the infection is caused by fungi, antifungal drugs will be prescribed instead of antibiotics.
• Surgery – In some cases, surgery may be required to repair or replace damaged heart valves, drain abscesses, or remove infected tissue. Surgery may also be necessary if the infection doesn’t respond to antibiotics or if complications like heart failure occur.
• Supportive care – Patients may require additional care, such as oxygen therapy, pain management, or medications to support heart function during treatment.

What Are the Risks and Complications of Endocarditis?
Endocarditis can lead to several serious complications if left untreated:

• Heart valve damage – The infection can damage or destroy heart valves, leading to long-term heart problems such as heart failure.
• Stroke – A blood clot caused by the infection may travel to the brain, causing a stroke.
• Organ damage – The infection can spread to other parts of the body, such as the kidneys, liver, or lungs, causing additional damage.
• Abscess formation – Pockets of pus (abscesses) can form in the heart or other organs, further complicating the infection.
• Sepsis – Sepsis, a life-threatening response to infection, can occur if the infection spreads throughout the body.

Can Endocarditis Be Prevented?
While endocarditis cannot always be prevented, certain precautions can reduce the risk of developing the infection:

• Antibiotics before procedures – For people at high risk of endocarditis (e.g., those with artificial heart valves or congenital heart defects), doctors may recommend antibiotics before certain dental, surgical, or medical procedures.
• Good hygiene – Practicing good oral hygiene, including regular brushing and flossing, can help prevent bacterial infections that could lead to endocarditis.
• Managing existing heart conditions – People with heart conditions should work with their healthcare provider to manage their condition and reduce the risk of complications.
• Avoiding intravenous drug use – Not sharing needles or using intravenous drugs can prevent bacteria from entering the bloodstream and reaching the heart.

Can People with Endocarditis Live a Normal Life?
With early diagnosis and appropriate treatment, many people recover from endocarditis and can return to a normal life. However, some may experience long-term complications, such as heart valve damage, which may require ongoing management and follow-up care. For people with severe complications, such as heart failure or stroke, recovery may be more challenging.