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A 66-Year-Old Man Is Evaluated for Recurrent Syncope

question 347

Multiple Choice

A 66-year-old man is evaluated for recurrent syncope. He has had 3 episodes of dizziness and palpitations followed by brief loss of consciousness over the last 6 months. He has no chest pain or dyspnea. The patient has a history of hypertension and hyperlipidemia. There is no family history of sudden death. Initial evaluation shows normal ECG and echocardiogram. A cardiac electrophysiologic study is performed. During the study, intravenous infusion of a medication is administered and produces the responses shown below. Which of the following medications was most likely administered to this patient?

Understand the fundamental principles and elements of operant conditioning.

Discriminate between key concepts in social and cognitive learning theories.

Define and differentiate types of conditioning and learning processes.

Recognize the role of punishment and reinforcement in learning.

Definitions:

Leaf Spring Rear Suspension

A type of vehicle suspension that uses long, narrow plates of steel, known as leaf springs, positioned under the rear part of the vehicle to provide support and absorb shocks.

Twin Zerks

Twin Zerks refer to a pair of grease fittings used in mechanical systems for lubrication purposes, allowing for easy maintenance and extended component life.

Trunnion Seals

Seals used in the trunnion assembly of a machine, such as a crane or a mill, to prevent leakage of fluids and protect against contamination.

Properly Greased

Refers to the application of an appropriate amount of grease to mechanical parts to ensure smooth operation and prevent wear.