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Protocoles de tests d'effort pour les femmes et les hommes atteints de CAD (PACED)

30 septembre 2026 mis à jour par: Ottawa Heart Institute Research Corporation

Comparaison des valeurs maximales de VO2 des protocoles de tests d'effort pour les femmes et les hommes atteints de CAD

The aim of this study is to determine if the test that allows males to achieve a higher VO2 (a measure of oxygen use during exercise) is different for females. The purpose of this study is to test 4 different exercise testing protocols to compare measured oxygen consumption in females and males with CAD (disease caused by the buildup of plaque in the artery walls which can lead to insufficient amounts of blood, nutrients and oxygen being supplied to the heart). The 4 exercise tests that will be completed on the treadmill are the modified Balke, modified Bruce, modified Naughton and University of Ottawa Heart Institute Slow Ramp protocols. Each test has a different stage duration (the amount of time that the test remains at a pre-determined speed and incline), and incremental increase in speed and incline.

The main purpose of this study is to compare VO2 peak (the maximal amount of oxygen utilized during the exercise test) of females and males with CAD in 4 different exercise protocols. For example, the investigators will find out:

  1. which exercise protocol is more likely to achieve a higher peak V̇O2 in females and which protocol is more likely to achieve a higher peak V̇O2 in males,
  2. if enjoyment affects the duration of the test, and
  3. how different exercise test protocols will provide different results of maximal oxygen used by the participant's body during the exercise test.

Aperçu de l'étude

Statut

Recrutement

Les conditions

Intervention / Traitement

Type d'étude

Observationnel

Inscription (Estimé)

54

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

Sauvegarde des contacts de l'étude

Lieux d'étude

  • Canada
    • Ontario
      • Ottawa, Ontario, Canada, K1Y 4W7
        • Recrutement
        • University of Ottawa Heart Institute
        • Contact:
        • Contact:

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

18 ans et plus (Adulte, Adulte plus âgé)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Tout

Méthode d'échantillonnage

Échantillon de probabilité

Population étudiée

Adults older than 18 years of age and have been diagnosed with CAD.

La description

Inclusion Criteria:

  1. 18 years and older;
  2. previous CAD diagnosis by a physician;
  3. can perform a CPET until volitional exhaustion;
  4. are able to self-ambulate on a treadmill;
  5. are at least 8 weeks post cardiovascular event or procedure (i.e., percutaneous coronary intervention (PCI), coronary artery bypass graft (CABG)); and,
  6. are able to provide written informed consent.

Exclusion Criteria:

  1. cannot speak, read, write, or understand English or French;
  2. currently not enrolled in a CR program;
  3. have recently changed (or planning to change) PA levels within the previous 4 weeks (as this may impact the ability to compare outcomes between exercise testing protocols);
  4. have heart failure with an ejection fraction <45% (indication of possible cardiomyopathy);6
  5. have an arrythmia (relative contraindication for exercise testing),6 peripheral artery disease, valvular disease, severe aortic stenosis, cardiomyopathy, SCAD and/or COPD (contraindications for maximal exercise testing);
  6. has an ICD;
  7. is pregnant (sustained vigorous exercise in pregnant women may induce fetal bradycardia)
  8. is unable to complete submaximal exercise testing (i.e., treadmill, due to musculoskeletal limitations).

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Modèles d'observation: CASE_ONLY
  • Perspectives temporelles: PROSPECTIVE

Cohortes et interventions

Groupe / Cohorte
Intervention / Traitement
CPETs

Patients will perform all 4 maximal cardiopulmonary exercise tests in randomized order. The protocols they will perform are: Modified Bruce, modified Naughton, modified Balke and the UOHI Slow Ramp.
Test diagnostique: Exercise Tests

Patients will complete 4 different cardiopulmonary exercise tests in random order.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Oxygen Consumption (VO2)
Délai: Week 1 to week 4 (measured weekly, at every appointment)

V̇O2 will be measured continuously throughout the treadmill CPET. Peak V̇O2, defined as the highest V̇O2 value that is achieved over a 20-s period during the last minute of the CPET. V̇O2 will be measured throughout each test by a metabolic system (Parvo Medics TrueOne 2400).
Week 1 to week 4 (measured weekly, at every appointment)

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Cardiometabolic health indicators - Blood pressure (BP)
Délai: Week 1 to week 4 (measured weekly, at every appointment)

Resting BP (mmHg) will be measured from a seated position using an automated BP monitor. BP will be measured manually using a BP cuff every 2 stages throughout the CPET using an automated BP monitor. Recovery BP will be measured after the completion of the test from a seated position using the automated BP monitor.
Week 1 to week 4 (measured weekly, at every appointment)
Cardiometabolic health indicators - Heart Rate (HR)
Délai: Week 1 to week 4 (measured weekly, at every appointment)

Heart rate will be measured from a seated position using an automated BP monitor. HR will be measured continuously throughout the CPET using a 4-lead electrocardiogram connected to a metabolic system. Recovery HR will be measured after the completion of the test from a seated position using the automated BP monitor.
Week 1 to week 4 (measured weekly, at every appointment)
Cardiometabolic health indicators - Body mass index
Délai: Week 1 to week 4 (measured weekly, at every appointment)

Height (cm) and body mass (kg) will be measured to compute body mass index (kg/m2).
Week 1 to week 4 (measured weekly, at every appointment)
Cardiometabolic health indicators - Fat mass
Délai: Week 1 to week 4 (measured weekly, at every appointment)

Fat mass (kg) and fat-free mass (kg) will be measured using bioelectrical impedance.
Week 1 to week 4 (measured weekly, at every appointment)
Cardiometabolic health indicators - Waist circumference
Délai: Week 1 to week 4 (measured weekly, at every appointment)

Waist circumference will be measured using standardized procedures (2 repeated measures using a tape; in centimeters).
Week 1 to week 4 (measured weekly, at every appointment)
Cardiometabolic health indicators - Height
Délai: Week 1 to week 4 (measured weekly, at every appointment)

Height will be measured using standardized procedures (2 repeated measures using a tape; in centimeters).
Week 1 to week 4 (measured weekly, at every appointment)
Blood Lactate
Délai: Week 1 to week 4 (measured weekly, at every appointment)

Blood lactate (mmol/L) will be measured in the last 30s of every test stage throughout the test using a blood lactate analyzer.
Week 1 to week 4 (measured weekly, at every appointment)
Rating of perceived exertion (RPE)
Délai: Week 1 to week 4 (measured weekly, at every appointment)

Measured at the end of every stage using the validated Borg 6-20 rating of perceived exertion scale. This scale measures how physically exerted an individual feels. 6 is complete rest (i.e., no exertion, ex: sitting in a chair not moving and relaxed), 20 is perceived maximal exertion of effort. These values are perceived measures of effort and will increase as the exercise test progresses and gets harder for the patient.
Week 1 to week 4 (measured weekly, at every appointment)
Test duration
Délai: Week 1 to week 4 (measured weekly, at every appointment)

Measured using portable metabolic system that is connected to a computer. The duration of the test will be recorded.
Week 1 to week 4 (measured weekly, at every appointment)
Reason for test termination
Délai: Week 1 to week 4 (collected weekly, at every appointment)

Reason for test termination will be collected subjectively by asking the patient (i.e., fatigue, muscular limitation, etc.)
Week 1 to week 4 (collected weekly, at every appointment)
Physical activity enjoyment
Délai: Week 1 to week 4 (collected weekly, at every appointment)

This is a subjective questionnaire that measures the extent to which the patient enjoyed participating in the test.
Week 1 to week 4 (collected weekly, at every appointment)
Most enjoyed test
Délai: Week 4 - collected at the patient's last appointment

Using a feedback questionnaire, the test that was most frequently ranked the most enjoyed by patients will be measured
Week 4 - collected at the patient's last appointment

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Ottawa Heart Institute Research Corporation

Les enquêteurs

  • Chercheur principal: Jennifer Reed, PhD, Ottawa Heart Institute Research Corporation

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

1 mars 2024

Achèvement primaire (Estimé)

1 décembre 2028

Achèvement de l'étude (Estimé)

1 décembre 2030

Dates d'inscription aux études

Première soumission

11 décembre 2023

Première soumission répondant aux critères de contrôle qualité

11 décembre 2023

Première publication (Réel)

21 décembre 2023

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

5 octobre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

30 septembre 2026

Dernière vérification

1 septembre 2026

Plus d'information

Termes liés à cette étude

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • 20230327-01H

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .

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