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The Effect of Heart Rate on Cardiac Index in Patients With Left Ventricular Hypertrophy

This study has been terminated.
(Insufficient no of patients eligible for enrollment.)
Sponsor:
ClinicalTrials.gov Identifier:
NCT01241838
First Posted: November 16, 2010
Last Update Posted: August 6, 2012
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
University of Aarhus
  Purpose
The purpose of this study is to compare the effect of heart rate on cardiac index in patients with or without left ventricular hypertrophy. The study will be conducted in postoperative heart surgery patients with a pacemaker.

Condition Intervention
Left Ventricular Hypertrophy Diastolic Dysfunction Heart Failure Heart Rate Device: Pacemaker

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Official Title: The Effect of Heart Rate on Cardiac Index in Patients With Left Ventricular Hypertrophy

Further study details as provided by University of Aarhus:

Primary Outcome Measures:
  • Cardiac index [ Time Frame: At heart rates 65-80-95-110-125 ]

Secondary Outcome Measures:
  • Mean arterial blood pressure [ Time Frame: At heart rates 65-80-95-110-125 ]
  • Ejection fraction [ Time Frame: Heart rates of 65-80-95-110-120 ]
    Echocardiographic index of systolic function

  • Strain [ Time Frame: Heart rates of 65-80-95-110-125 ]
    Echocardiographic index of systolic function

  • S-max [ Time Frame: Heart rates of 65-80-95-110-125 beats per second ]
    Echocardiographic index of systolic function

  • E/E' [ Time Frame: Heart rates of 65-80-95-110-125 beats per second ]
    Echocardiographic index of diastolic function

  • E/A ratio [ Time Frame: Heart rates of 65-80-95-110-125 beats per second ]
    Echocardiographic index of diastolic function

  • E'/A' ratio [ Time Frame: Heart rates of 65-80-95-110-125 beats per second ]
    Echocardiographic index of diastolic function

  • Isovolumetric relaxation index [ Time Frame: Heart rates of 65-80-95-110-125 beats per second ]
    Echocardiographic index of diastolic function

  • IVRT/IVRT' [ Time Frame: Heart rates of 65-80-95-110-125 beats per second ]
    Echocardiographic index of diastolic function

  • End diastolic volume [ Time Frame: Heart rates of 65-80-95-110-125 beats per second ]
    Volume of left ventricle and end diastole

  • End systolic volume [ Time Frame: Heart rates of 65-80-95-110-125 beats per second ]
    Volume of left ventricle at end systole


Enrollment: 11
Study Start Date: February 2011
Study Completion Date: August 2012
Primary Completion Date: August 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: Normal left ventricular size
Postoperative patient with normal left ventricular size
Device: Pacemaker
Routine postoperative temporary pacemaker Rate change of 65-80-95-110-125 beats/second in random order at day 3-4 after operation
Active Comparator: Left ventricular hypertrophy
Postoperative patient with left ventricular hypertrophy
Device: Pacemaker
Routine postoperative temporary pacemaker Rate change of 65-80-95-110-125 beats/second in random order at day 3-4 after operation

  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   30 Years to 90 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Scheduled heart surgery including thoracotomy
  • Ejection fraction > 45%
  • Duration of QRS complex < 120 milliseconds
  • Sinus rhythm
  • Planned perioperative temporary pacemaker

Group: Left ventricular hypertrophy:

Thickness of interventricular septum and posterior wall >11 mm.

Group: No left ventricular hypertrophy:

Thickness of interventricular septum and posterior wall <11 mm.

Exclusion Criteria:

  • Active endocarditis
  • Severe mitral insufficiency
  • No patient consent
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01241838


Locations
Denmark
Department of Anaesthesiology, Århus University Hospital
Århus N, Denmark, 8200
Sponsors and Collaborators
University of Aarhus
Investigators
Principal Investigator: Peter Juhl-Olsen, M.D. Department of Anaesthesiology, Århus University Hospital
  More Information

Responsible Party: University of Aarhus
ClinicalTrials.gov Identifier: NCT01241838     History of Changes
Other Study ID Numbers: 1717
First Submitted: November 15, 2010
First Posted: November 16, 2010
Last Update Posted: August 6, 2012
Last Verified: August 2012

Keywords provided by University of Aarhus:
Heart failure
Left ventricular hypertrophy
Diastolic dysfunction

Additional relevant MeSH terms:
Heart Failure
Hypertrophy
Hypertrophy, Left Ventricular
Heart Diseases
Cardiovascular Diseases
Pathological Conditions, Anatomical
Cardiomegaly