Comparative Study of Cardiopulmonary Exercise Test Land Versus Water

Study Overview
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Brief Summary
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At the neck level immersion, the water pressure causes significant displacement of blood from the lower limbs to the Intrathoracic circulation, triggering adaptive physiological responses due to the increase in central blood volume and consequent cardiovascular burdens. Immersion in warm water breaks the homeostasis, stimulates regulation mechanisms and responses of organs and systems beneficial to healthy and heart failure individuals. In literature there are a growing number of studies demonstrating the efficacy of exercises performed in the water.

Detailed Description
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This study is about to compare the responses of one effort in two different environment. A group of 90 men, age between 55 to 75 years old recruited after a medical consultation, with the diagnostic of Congestive Heart Failure (CHF), under treatment at the Institute of Medicine and Rehabilitation and Institute Dante Pazzanesi, considered clinically stable (no cardiac symptoms or changes in medication for at least 30 days) and Funcional Class I, II, III according to NYHA. Experimental Design: Patients will perform an test, first on land, and in a week time in a underwater treadmill. The data will be collected in four distinct moments: 1- anaerobic threshold (AT), 2- respiratory compensation point (RCP), 3- maximal effort (ME) and recovery (R). We will compare the following variables: test total time; perceived exertion scale (Borg); Heart rate (HR); Oxygen consumption (VO2); Carbon Dioxide production (VCO2); Oxygen pulse (VO2/FC); the ventilatory efficiency (VE/VO2) and (VE/VCO2); Respiratory quotient (VCO2/VO2); Systolic and Diastolic blood pressure; electrocardiographic changes, compatible with ischemia or arrhythmia.

Official Title
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Comparative Study of Cardiopulmonary Exercise Test on Land and Underwater in Patients With Congestive Heart Failure

Conditions
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Congestive Heart Failure

Intervention / Treatment
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* Other: Aerobic and anaerobic capacity use aquatic exercises


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patientes, 55 - 75 year, with Congestive Heart Failure (CHF)Functional class I - II and III according to the New York Heart Association (NYHA) and Injection Fracion 32% to 38% Exclusion Criteria: Any peripheral artery disease, diabetes, pulmonary disease, hypertension (blood pressure >160/90) or significant cardiovascular morbidity.

Ages Eligible for Study
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Minimum Age: 55 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: comparation VE/VO2 and VE/VCO2<br> | Other: Aerobic and anaerobic capacity use aquatic exercises<br>* Improve aerobic capacity use aquatic exercises in patients with Congestive Heart Failure<br>* Other names: Aerobic and anaerobic capacities;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To appraisal the cardiopulmonar activities during the effort on land and in immersion |  | one year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To develop an especific water protocol for reabilitations of patients with Congestive Heart Failure (CHF). The authors expect a beneficial adaptive response to the exercise in water comparing exercise on land. |  | one year | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Ergospirometry, Cardiopulmonary Exercise Test, Exercises, Immersion