Anesthesia Knowledge Test-6 (AKT-6) Practice Exam 2026 - Free Anesthesia Practice Questions and Study Guide

The significant physiological effect of ketamine administration is an increase in systolic blood pressure. Ketamine is known for its unique profile as a dissociative anesthetic. One of its notable cardiovascular effects is that it tends to stimulate the sympathetic nervous system, which can lead to increased heart rate and elevated blood pressure, particularly systolic blood pressure.

This response is beneficial in many clinical situations, especially in patients who may be hemodynamically unstable or at risk of hypotension. Ketamine's ability to preserve or sometimes elevate blood pressure contrasts with many other anesthetics that can cause vasodilation and hypotension.

In understanding the other choices, decreased heart rate is typically not associated with ketamine; instead, there may be an increase or stability in heart rate. Increased bronchoconstriction is not a recognized effect of ketamine; it can actually produce a bronchodilatory effect, making it a useful choice for patients with reactive airway disease. Lastly, while respiratory rate may decrease due to ketamine's sedative effects, it does so to a lesser extent than other anesthetic agents, and the overall respiratory function is often maintained, unlike what is suggested by the answer regarding decreased respiratory rate.