Progressive Care Nursing Certification (PCCN) Practice Exam

In treating pulmonary embolism, what is the role of tachycardia?

1. indicates significant fluid overload

2. may signify the severity of the embolus

3. indicates right heart failure

4. is a symptom of left ventricular dysfunction

The correct answer is: may signify the severity of the embolus

In the context of pulmonary embolism, tachycardia serves as an important clinical indicator. It may signify the severity of the embolus because when a significant obstruction occurs in the pulmonary arteries due to an embolism, the body's compensatory mechanisms kick in to maintain adequate blood flow and oxygenation. The heart attempts to pump faster to compensate for decreased perfusion, which directly correlates with the severity of the obstruction caused by the embolism. Patients experiencing tachycardia in the setting of a pulmonary embolism typically have an increased workload on the heart, as it strives to overcome the blocked blood flow. The degree of tachycardia can often provide insights into the extent of the embolic event—more severe emboli tend to elicit more pronounced tachycardic responses. Monitoring heart rate in such situations can be vital for assessing the patient's stability and the urgent need for therapeutic intervention. Understanding this relationship assists healthcare providers in evaluating the overall clinical picture and prioritizing treatment for the patient.