Doctors warn: Pulmonary embolism symptoms often mistaken for panic attacks

Your heart hammers against your ribs. The room tilts slightly. You can't seem to pull enough air into your lungs no matter how hard you try, and there's a crushing weight across your chest that makes you certain something catastrophic is happening. Your mind floods with dread. Everyone around you says the same thing: breathe, calm down, it's just anxiety. But what if they're wrong? What if your body isn't panicking at all, but screaming because something genuinely dangerous is unfolding inside it?

This scenario plays out far more often than most people realize. Pulmonary embolism—a blood clot lodged in the lungs—produces symptoms so similar to a panic attack that doctors across the country watch patients get sent home with reassurance when they actually need emergency intervention. Dr. Nitish Anchal, head of vascular and endovascular surgery at Manipal Hospitals in New Delhi, has spent his career witnessing this dangerous confusion. He describes the core problem plainly: the body's signals of a life-threatening clot—racing heart, breathlessness, overwhelming dread—are nearly identical to what people experience during anxiety, which means the condition gets missed with alarming frequency.

The stakes of this misdiagnosis are staggering. Pulmonary embolism ranks as the third most common cardiovascular disease in the world, trailing only heart attacks and stroke. Yet it kills more people than myocardial infarction does. The reason is brutal in its simplicity: heart attacks are easier to recognize and treat, so they get caught earlier. Pulmonary embolism, mistaken for panic or dismissed as stress, often goes undetected until it's too late. In the United States alone, venous thromboembolism—the broader category that includes pulmonary embolism—affects between 300,000 and 600,000 people annually. For those over 80, the risk climbs to as high as one in 100.

Understanding what actually happens inside the body helps explain why the symptoms feel so terrifying. A pulmonary embolism begins as a blood clot, usually forming in a leg or arm. That clot breaks loose, travels through the veins, and lodges in the lungs. Once it's stuck there, blood flow to the lungs becomes restricted. Oxygen levels drop. The heart must work harder to pump blood through the blocked vessels, sending blood pressure spiking in the pulmonary arteries. Your nervous system recognizes the crisis and shifts into survival mode. The racing heart, the gasping for breath, the sense of impending doom—these aren't psychological. They're your body's accurate assessment of a genuine emergency.

The symptoms themselves are deceptively varied. Some people experience sudden, severe shortness of breath that doesn't ease with rest or movement. Others develop sharp chest pain that radiates outward—to the arm, back, shoulder, neck, or jaw—and worsens when they breathe deeply. Some notice their breathing becoming unusually rapid, sometimes accompanied by wheezing. A persistent cough may develop, and in some cases, that cough brings up bloody mucus. The heart rate accelerates while sweat pours out, and the skin may turn pale, clammy, or even take on a bluish tint. Dizziness, lightheadedness, or fainting can occur. The symptoms can arrive suddenly or build gradually, which is part of what makes them so easy to misinterpret as anxiety.

Certain people face higher risk. Those who've had recent surgery, suffered a recent injury, or spent extended periods immobilized—whether from a long flight, bed rest, or a cast—are more vulnerable. A family history of blood clots increases risk substantially. People with diabetes or cancer carry elevated danger. For these individuals, the window between symptom onset and diagnosis becomes critical. What feels like a panic attack in the moment might actually be a body in crisis, asking for urgent medical attention that could mean the difference between survival and death.

Dr. Anchal's warning carries the weight of experience: ignoring these symptoms or waiting them out can cost irreplaceable time. Getting checked early isn't overreacting. It's the only rational response when the stakes are this high.