Final answer:
Uncontrolled hypertension (Option A) is a relative contraindication for symptom-limited maximal exercise testing as it can pose additional risk during the strenuous activity of the test; whereas recent myocardial infarction and known aortic dissection are absolute contraindications.
Step-by-step explanation:
The question "Which of the following is a relative contraindication for symptom-limited maximal exercise testing? A) Uncontrolled hypertension B) Recent myocardial infarction (within 2 days) C) Left bundle branch block D) Known aortic dissection" relates to evaluating the safety of a patient before undergoing strenuous exercise testing, which is often used to diagnose and evaluate heart disease.
A relative contraindication means that caution should be used when deciding to proceed with the test as there could be an increased risk of complications. Among the options given, uncontrolled hypertension (A) is a relative contraindication for symptom-limited maximal exercise testing. Although exercise testing may still be performed in some circumstances, extra caution is warranted for individuals with uncontrolled high blood pressure due to the additional strain that can be placed on the cardiovascular system.
On the other hand, recent myocardial infarction (B) and known aortic dissection (D) are typically considered absolute contraindications to exercise testing because they pose a direct and immediate risk to the patient's life if stressed by exercise. A left bundle branch block (C) can complicate the interpretation of the test results but is not in itself a contraindication.