Final answer:
The maneuver that increases the obstruction in patients with hypertrophic obstructive cardiomyopathy is leg raising.
Step-by-step explanation:
The maneuver that increases the obstruction in patients with hypertrophic obstructive cardiomyopathy is Leg raising (A). When a patient with hypertrophic obstructive cardiomyopathy raises their legs, it increases the preload on the heart, leading to an increase in obstruction of blood flow from the left ventricle to the aorta.
Cardiology is the branch of medicine that deals with the study, diagnosis, and treatment of disorders related to the heart and the circulatory system. Cardiologists, medical professionals specializing in cardiology, are trained to diagnose and manage a wide range of cardiovascular conditions.