What physiological measurement change can indicate a pulmonary embolism?

Tachycardia, or an elevated heart rate, is a common physiological change observed in patients experiencing a pulmonary embolism. When a pulmonary embolism occurs, a clot blocks blood flow in the pulmonary arteries, which can lead to decreased oxygen levels and increased pressure in the right side of the heart. As the body responds to these changes, it compensates by increasing the heart rate to maintain cardiac output and ensure adequate blood flow to vital organs. This increased heart rate is a hallmark sign of the stress and strain placed on the cardiovascular system due to the obstruction of blood flow in the lungs.

In cases of pulmonary embolism, patients may present with additional symptoms such as shortness of breath, chest pain, and anxiety, but tachycardia is a key indicator that can be measured and monitored. Understanding this physiological response is critical for recognizing and diagnosing pulmonary embolism promptly, which is crucial for initiating appropriate treatment.