Cardiovascular Oscillations in Coronary Patients With and Without Type 2 Diabetes

NCT ID: NCT02050399

Last Updated: 2018-01-26

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2013-08-31

Study Completion Date

2016-03-31

Brief Summary

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Coronary artery disease (CAD) and diabetes mellitus (DM) may promote alterations in heart responses during exercise or postural maneuver. Thus, the purpose of this study is to observe the influence of different postures (supine, seated and standing) and different percentages (15, 30, 45 and 60%) of the maximum voluntary contraction (MVC) of handgrip in the responses of heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), cardiac output (CO), stroke volume (SV) and peripheral vascular resistance (PVR) in coronary patients with and without type 2 diabetes.

Detailed Description

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Conditions

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Coronary Artery Disease Diabetes Mellitus, Type 2

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

FACTORIAL

Primary Study Purpose

OTHER

Blinding Strategy

SINGLE

Participants

Study Groups

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Healthy subjects

15 men, 45 and 65 years old. After initial evaluation, clinical exercise testing, cardiopulmonary exercise testing, carotid ultrasound, laboratory tests (biochemical blood) and isometric exercise protocol will be performed.

Group Type ACTIVE_COMPARATOR

Isometric exercise

Intervention Type OTHER

The isometric protocol (handgrip) will be performed into 4 percentages of MVC (15, 30, 45 and 60%) to exhaustion in 3 postures (supine, seated and standing position). The percentages and the postures will be randomized. In the first day of exercise protocol the subjects will be at rest during 10 minutes and will perform 3 MVC during 5 seconds, with 5 minutes of recovery. The higher value of MVC will be used to prescribe the percentages. The subjects will perform two contractions until exhaustion in one posture in each day.

Coronary disease with Type 2 Diabetes

15 men, 45-65 years old, with coronary artery disease and type 2 diabetes will perform clinical exercise testing, cardiopulmonary exercise testing, carotid ultrasound, laboratory tests (biochemical blood), clinical autonomic tests and isometric exercise protocol will be performed.

Group Type EXPERIMENTAL

Isometric exercise

Intervention Type OTHER

The isometric protocol (handgrip) will be performed into 4 percentages of MVC (15, 30, 45 and 60%) to exhaustion in 3 postures (supine, seated and standing position). The percentages and the postures will be randomized. In the first day of exercise protocol the subjects will be at rest during 10 minutes and will perform 3 MVC during 5 seconds, with 5 minutes of recovery. The higher value of MVC will be used to prescribe the percentages. The subjects will perform two contractions until exhaustion in one posture in each day.

Coronary disease without Type 2 Diabetes

15 men, 45-65 years old, with coronary artery disease will perform clinical exercise testing, cardiopulmonary exercise testing, carotid ultrasound, laboratory tests (biochemical blood) and isometric exercise will be performed.

Group Type EXPERIMENTAL

Isometric exercise

Intervention Type OTHER

The isometric protocol (handgrip) will be performed into 4 percentages of MVC (15, 30, 45 and 60%) to exhaustion in 3 postures (supine, seated and standing position). The percentages and the postures will be randomized. In the first day of exercise protocol the subjects will be at rest during 10 minutes and will perform 3 MVC during 5 seconds, with 5 minutes of recovery. The higher value of MVC will be used to prescribe the percentages. The subjects will perform two contractions until exhaustion in one posture in each day.

Interventions

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Isometric exercise

The isometric protocol (handgrip) will be performed into 4 percentages of MVC (15, 30, 45 and 60%) to exhaustion in 3 postures (supine, seated and standing position). The percentages and the postures will be randomized. In the first day of exercise protocol the subjects will be at rest during 10 minutes and will perform 3 MVC during 5 seconds, with 5 minutes of recovery. The higher value of MVC will be used to prescribe the percentages. The subjects will perform two contractions until exhaustion in one posture in each day.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* coronary artery disease
* clinical diagnosis of type 2 diabetes
* free of type 2 diabetes to participate of control group and coronary disease without Type 2 Diabetes group
* nonsmokers
* not alcoholics

Exclusion Criteria

* autonomic neuropathy
* clinical exercise testing with ECG alterations (ST-segment depression greater than 2 mm, ventricular and supraventricular arrhythmias, sustained or non-sustained supraventricular tachycardia, atrial tachycardia, atrial fibrillation and atrioventricular blocks) or symptom of angina induced by stress.
* Individuals with hypertension and diabetes mellitus not controlled.
* Subjects who did not complete all assessments.
* Subjects with temporal (R-Ri and pressure) series with noise preventing the evaluation
Minimum Eligible Age

45 Years

Maximum Eligible Age

65 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

Yes

Sponsors

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Universidade Federal de Sao Carlos

OTHER

Sponsor Role lead

Responsible Party

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Aparecida Maria Catai

Cardiovascular oscillations at rest and during isometric exercise in coronary patients with and without type 2 diabetes

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Aparecida Maria Catai

Role: PRINCIPAL_INVESTIGATOR

Universidade Federal de Sao Carlos

Locations

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Universidade Federal de São Carlos

São Carlos, São Paulo, Brazil

Site Status

Countries

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Brazil

References

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Leite PH, Melo RC, Mello MF, Silva Ed, Borghi-Silva A, Catai AM. Heart rate responses during isometric exercises in patients undergoing a phase III cardiac rehabilitation program. Rev Bras Fisioter. 2010 Sep-Oct;14(5):383-9. English, Portuguese.

Reference Type BACKGROUND
PMID: 21180863 (View on PubMed)

Amaral JF, Mancini M, Novo Junior JM. Comparison of three hand dynamometers in relation to the accuracy and precision of the measurements. Rev Bras Fisioter. 2012 Jun;16(3):216-24. doi: 10.1590/s1413-35552012000300007.

Reference Type BACKGROUND
PMID: 22801514 (View on PubMed)

Legramante JM, Massaro M, Raimondi G, Castrucci F, Cassarino S, Peruzzi G, Iellamo F. Effect of postural changes on cardiovascular responses to static exercise in hypertensive human beings. J Hypertens. 1999 Jan;17(1):99-105. doi: 10.1097/00004872-199917010-00015.

Reference Type BACKGROUND
PMID: 10100100 (View on PubMed)

Porta A, Catai AM, Takahashi AC, Magagnin V, Bassani T, Tobaldini E, van de Borne P, Montano N. Causal relationships between heart period and systolic arterial pressure during graded head-up tilt. Am J Physiol Regul Integr Comp Physiol. 2011 Feb;300(2):R378-86. doi: 10.1152/ajpregu.00553.2010. Epub 2010 Oct 20.

Reference Type BACKGROUND
PMID: 20962207 (View on PubMed)

Krzeminski K, Cybulski G, Ziemba A, Nazar K. Cardiovascular and hormonal responses to static handgrip in young and older healthy men. Eur J Appl Physiol. 2012 Apr;112(4):1315-25. doi: 10.1007/s00421-011-2069-y. Epub 2011 Jul 28.

Reference Type BACKGROUND
PMID: 21796411 (View on PubMed)

Millar PJ, MacDonald MJ, McCartney N. Effects of isometric handgrip protocol on blood pressure and neurocardiac modulation. Int J Sports Med. 2011 Mar;32(3):174-80. doi: 10.1055/s-0030-1268473. Epub 2010 Dec 16.

Reference Type BACKGROUND
PMID: 21165806 (View on PubMed)

Other Identifiers

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13287613.0.0000.5504

Identifier Type: -

Identifier Source: org_study_id

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