NCT01977222

Improving Functional Capacity in Fontan Patients Through Inspiratory Muscle Training

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 12 (actual)
• Sponsor: Boston Children's Hospital · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Mechanisms that typically result in increased cardiac output, such as inotropic support, increased heart rate, and decreased afterload, have a blunted effect in Fontan circulation. The "thoracic pump" is a contributor to venous return that has been largely unexplored in patients with Fontan physiology. Inspiratory muscle training can improve the performance of competitive athletes across a range of sports and can improve quality of life and functional capacity in heart failure patients, presumably by reducing inspiratory muscle fatigue and possibly by improving peripheral blood flow during exercise. One could surmise that the effects of these changes would be particularly important in the Fontan population. The investigators propose to study the effects of inspiratory muscle training on exercise and pulmonary function parameters in a cohort of adult Fontan patients. The investigators hypothesize that a 12-week program of inspiratory muscle training with an inspiratory impedance threshold device will improve inspiratory muscle strength and endurance, and that this will translate into improved exercise performance in patients with Fontan physiology.

Conditions

• Congenital Heart Disease
• Single Ventricle

Interventions

Type	Name	Description
DEVICE	THRESHOLD(TM) INSPIRATORY MUSCLE TRAINER	Subjects will be provided with noseclips and a threshold impedance device set to 40% of their measured maximal inspiratory pressure and will be trained on using the device. Specifically, subjects will be instructed to breathe through the inspiratory muscle training device while wearing noseclips at a rate of 12 to 16 breaths per minute for 30 minutes a day, 5 days a week for 12 consecutive weeks. Each subject will be provided a customized schedule for increasing resistance by 2 cm H2O every 2 weeks to a maximum resistance of 41 cm H2O.

Timeline

• Start date: 2013-12-01
• Primary completion: 2015-03-01
• Completion: 2015-03-01
• First posted: 2013-11-06
• Last updated: 2017-11-14
• Results posted: 2017-11-14

Locations

1 site across 1 country: United States