If you have ongoing severe chest pain, worsening shortness of breath, fainting, sudden weakness or speech changes, call emergency services or go to the nearest emergency department immediately. An elevated troponin indicates stress or injury to the heart muscle but does not always mean there is a blocked coronary artery visible on angiography. When angiography is clean, several explanations are possible. One is a myocardial bridge: a coronary artery that runs through the heart muscle (rather than on its surface) and may be compressed during contraction, which can contribute to symptoms and a rise in troponin. Other possibilities include non-obstructive myocardial infarction (MINOCA), inflammatory conditions affecting the heart, transient ischemia, or stress-related injury. Determining the exact cause usually requires cardiology follow-up and additional tests (for example, cardiac MRI, coronary CT or functional ischemia testing). If symptoms continue or worsen, seek urgent medical evaluation.