Pericardial Effusion Presenting as Isolated Right Upper Quadrant Pain with Deranged Liver Enzymes a Diagnostic Pitfall in the Emergency Department a Case Report

The human heart is a pump that relies on a delicate balance of pressure and space to function. It sits inside a protective, double-layered sac called the pericardium, which normally holds a tiny amount of fluid to keep the heart moving smoothly without friction. When too much fluid builds up in this sac, it creates a condition known as a pericardial effusion. As this fluid accumulates, it can squeeze the heart, preventing it from filling properly with blood. This pressure can eventually lead to a life-threatening emergency called cardiac tamponade, where the heart simply cannot pump enough blood to sustain the body. While doctors usually expect patients with this condition to complain of chest pain or trouble breathing, the body sometimes sends confusing signals. In rare cases, the pressure from the fluid backs up into the veins that drain the liver, causing the liver to swell and become painful. This can make a heart problem look exactly like a liver or gallbladder issue, leading to a dangerous diagnostic trap in the emergency room.

A team of medical professionals recently documented a striking example of this confusion in a case report involving a 43-year-old woman. She arrived at the emergency department with severe pain in the upper right side of her abdomen, a location where the liver and gallbladder sit. She had no chest pain, no shortness of breath, and no other signs of heart trouble. Her medical history included HIV infection, which was well-controlled with medication, and a past infection of tuberculosis that had been treated. Because her pain was localized to her abdomen and her blood tests showed that her liver enzymes were significantly elevated, the medical team initially suspected she had acute cholecystitis, an inflammation of the gallbladder. This is a common and logical conclusion for a patient with these specific symptoms and lab results.

However, the doctors decided to look deeper. A simple chest X-ray revealed a heart that looked unusually large and round, often described as a "globular" shape, which hinted that fluid might be surrounding it. A quick ultrasound performed right at the bedside confirmed their suspicion: the woman had a massive collection of fluid around her heart, measuring 34 millimeters in depth. Further imaging with a CT scan showed that this fluid was not just sitting there; it was compressing the heart and causing the veins leading to the liver to become engorged. The scan also showed fluid around the gallbladder, but crucially, the gallbladder itself was not inflamed or filled with stones. The picture that emerged was not of a sick gallbladder, but of a heart that was struggling to fill, causing a backup of pressure that made the liver hurt.

To treat the problem, the doctors performed a procedure called pericardiocentesis, where they carefully drained the fluid from around the heart. They removed 300 milliliters of a reddish, watery fluid. The result was immediate and dramatic. The woman's abdominal pain vanished completely, and her liver enzyme levels began to drop rapidly, confirming that the heart condition was indeed the cause of her liver distress. The medical team hoped this single drainage would be enough, but the situation proved more complex. Just five days later, the woman returned to the hospital. The fluid had returned, and this time it was accompanied by signs consistent with cardiac tamponade, including a raised jugular venous pressure and features of Beck's triad.

Recognizing that the fluid was coming back too quickly, the surgeons performed a more permanent solution. They created a small surgical opening, known as a pericardial window, to allow the fluid to drain continuously. During this operation, they found that the lining of the heart sac was thickened, suggesting an ongoing inflammatory process. They drained an additional 700 milliliters of fluid. Despite extensive testing of the fluid and the tissue, the doctors could not identify a specific cause, such as a new infection or cancer. The fluid did not contain bacteria, fungi, or cancer cells, and tests for tuberculosis were negative, even though the patient had a history of the disease.

This case serves as a critical reminder for medical professionals that heart problems can sometimes hide behind the symptoms of abdominal diseases. The woman's liver pain was a direct result of the heart being squeezed, not a disease of the liver itself. The doctors noted that the absence of typical heart symptoms like chest pain or difficulty breathing made the diagnosis particularly difficult. They emphasized that relying on the classic signs of heart failure, such as low blood pressure and muffled heart sounds, can be misleading because these signs often appear only after the condition has become severe. The key to solving this puzzle was the chest X-ray, which provided the first clue that the heart was the source of the trouble, leading to an ultrasound that confirmed the diagnosis.

The report concludes that when a patient presents with unexplained abdominal pain and abnormal liver tests, doctors should consider the possibility of a heart issue, even if the patient feels fine otherwise. This is especially important for individuals with risk factors like HIV or a history of tuberculosis. In this specific case, the rapid return of the fluid suggested an inflammatory cause, but the exact reason for the inflammation remains a mystery. The successful treatment involved draining the fluid and creating a surgical window to prevent it from building up again, which resolved the patient's symptoms and stabilized her condition. The story underscores the importance of keeping a broad range of possibilities in mind when the body presents confusing symptoms, ensuring that a treatable heart condition is not mistaken for a common abdominal ailment.