What is a common presentation on EKG for a patient with pulmonary embolism?

In patients with pulmonary embolism, sinus tachycardia is a frequently observed finding on EKG. This increase in heart rate occurs as a compensatory response to reduced oxygenation and increased pulmonary pressure resulting from the blockage of pulmonary arteries. The body's attempt to maintain adequate blood flow and oxygen delivery to tissues leads to an elevated heart rate, making sinus tachycardia a common manifestation in these cases.

The presence of sinus tachycardia on the EKG in the context of pulmonary embolism also highlights the acute stress placed on the cardiovascular system due to the sudden obstruction of blood flow. This finding is particularly relevant in a clinical setting, as it can help to raise suspicion for pulmonary embolism when evaluating patients with sudden onset dyspnea or chest pain.

The other choices can occur in various scenarios but are not typical findings associated specifically with pulmonary embolism. For example, bradycardia is less common and may indicate an alternative diagnosis such as a lower respiratory issue or increased vagal tone, while ST elevation is more closely associated with myocardial infarction. QT prolongation may result from different metabolic disturbances or drug effects rather than being a characteristic feature of pulmonary embolism. Thus, sinus tachycardia stands out as the most common