The Effects of the Inspiratory Muscle Plus Aerobic Training Compare to Aerobic Training Alone in Heart Failure Patients.

Heart Failure Clinical Trial

Official title: The Effects of the Inspiratory Muscle Training Plus Aerobic Training Compare to Aerobic Training Alone in Heart Failure Patients With Inspiratory Muscle Weakness.

Status Recruiting

Clinical Trial Summary

This study aims to compare effects of inspiratory muscle training added by aerobic training to aerobic training alone in heart failure patients with inspiratory muscle weakness. To do so, strength and endurance of inspiratory muscles, functional capacity, quality of life, heart rate variability and sleep apnea evaluations will be conducted in patients with heart failure.

Clinical Trial Description

A sample comprising at least 30 individuals is necessary. These subjects will be randomized in two groups, one consisting of inspiratory muscle training plus aerobic training, whereas the other will consist of the aerobic training alone.

This prospective, randomized, controlled trial will include patients with the diagnosis of chronic heart failure attributable to left ventricular systolic dysfunction who will be recruited from the Heart Failure Clinic.

Entry criteria for the study are a previous history of symptomatic heart failure caused by left ventricular systolic dysfunction, inspiratory muscle weakness (PImax < 70% of the predicted), and clinical stability, including no change in medications for the past three months.

Exclusion criteria will be unstable angina, myocardial infarction, or cardiac surgery within the previous three months, chronic metabolic, orthopedic, or infectious diseases, treatments with steroids, hormones, or cancer chemotherapy, history of exercise-induced asthma, chronic obstructive pulmonary disease and smokers will be not recruited.

The protocol was approved by the Committee for Ethics in Research of Hospital de Clinics de Porto Alegre and Ijuí University and all subjects are required to sign an informed consent form.

Variables will be measured by strength and endurance (progressive and constant load), 6-min walk test, cardiopulmonary exercise testing, quality of life questionnaire, evaluation of the heart rate variability and sleep apnea.

The inspiratory muscle training plus aerobic training will consist of cycle exercise (3 sessions/week) and inspiratory exercise by using Threshold equipment for 30 min, 7 times per week, whereas aerobic training group will perform only cycle exercise. Both treatments will last 12 weeks. ;

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Heart Failure
• Muscle Weakness
• Respiratory Aspiration

• NCT number: NCT00634296
• Study type: Interventional
• Source: Hospital de Clinicas de Porto Alegre
• Contact: Jorge P. Ribeiro, MD, ScD
• Phone: +55 51 9982 4984
• Email: jpribeiro@cpovo.net
• Status: Recruiting
• Phase: N/A
• Start date: March 2005
• Completion date: March 2010