Heart FailureNCT01431027
Left Ventricular Torsional Hysteresis: A Global Parameter for Diastolic Function
An observational study of Heart Failure and Diastolic Heart Failure, run by University of Alabama at Birmingham at 2 sites in United States.
Trial summary
Diastolic dysfunction refers to abnormal mechanical properties of the myocardium and includes abnormal LV diastolic distensibility, impaired filling and slow or delayed relaxation- regardless of whether the ejection fraction is normal or depressed and whether the patient is asymptomatic or symptomatic. Read more about this study
- Who is it for?
- Ages 19 years and older
- Conditions the study is for
- Heart Failure, Diastolic Heart Failure, Heart Failure With Normal Ejection Fraction
- How many people
- 45 participants
- Where
- 2 sitesUnited States
- Study dates
- Aug 2011to Jun 2015
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 19 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Patients scheduled for cardiac catheterization.
Who may be able to join
- Major inclusion criteria: Normal screening LV ejection fraction.
Who cannot join
- Atrial fibrillation or other significant cardiac arrhythmia on ECG
- Presence of pacemaker or defibrillator
- Angioplasty or primary coronary intervention PCI/PTCA during index cardiac catheterization.
- Patient is unable to undergo cardiac MRI due to contraindication to MRI (MRI incompatible metal prosthesis or implants or significant claustrophobia).
- Patient taking phosphodiesterase 5 inhibitor (eg. sildenafil) will be excluded due to potential interaction with nitroglycerin.
Trial locations and contacts
2 sites in 1 country.
United States2 sites
VA Medical Center
Birmingham, Alabama, 35243
UAB Hospital
Birmingham, Alabama, 35294
About this study
Diastolic dysfunction refers to abnormal mechanical properties of the myocardium and includes abnormal LV diastolic distensibility, impaired filling and slow or delayed relaxation- regardless of whether the ejection fraction is normal or depressed and whether the patient is asymptomatic or symptomatic. Epidemiologic studies have demonstrated high prevalence of diastolic heart failure (DHF). The quality of life of these patients is impaired and the clinical outcomes are similar to those with heart failure with systolic dysfunction. Therefore diastolic dysfunction has significant adverse economic impact that is expected to grow further with time. Clinical characteristics alone may not be sufficient to diagnose diastolic dysfunction. A number of invasive and non-invasive parameters have been proposed to diagnose diastolic dysfunction. Most of the presently used non-invasive parameters have a number of limitations. High fidelity measurement of the left ventricular pressures is needed to accurately diagnose diastolic dysfunction. Obtaining it in routine clinical practice is impractical.
In this protocol the investigators have proposed a novel non-invasive parameter called 'Torsional Hysteresis' as a measure of diastolic function. This will be measured using non-invasive cardiac MRI technique. During left ventricular contraction and relaxation, myocardium deforms. During cardiac cycle the myocardium goes back to baseline state prior to beginning of each contraction. However the rate with which it returns to the baseline state is variable. Torsion indicates relative wringing motion of the ventricle around a left ventricular axis and is a global parameter of left ventricular deformation. The parameters have defined a new parameter called torsional hysteresis based on non invasive cardiac MRI assessment. The parameters have hypothesized that for diastolic dysfunction, the torsional hysteresis area is increased as compared to no diastolic dysfunction group.
- Keywords
- Heart Failure, Diastolic Heart Failure, Heart Failure with Normal Ejection Fraction
- Medical subject headings
- Heart Failure, Heart Failure, Diastolic
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Diastolic Function | Patients scheduled for cardiac catheterization. |
What is being measured
The primary outcome is the main question the study is designed to answer.
To show that torsional hysteresis relates to invasive hemodynamic measure of diastolic function
To show that torsional hysteresis relates to invasive hemodynamic measure of diastolic function: a) Exponential fall of pressure during isovolumic relaxation phase by the time constant of relaxation, tau and b) LV end diastolic pressure-volume relationship (EDPVR).
Measured: one time at enrollment
Secondary outcomes (2)
To demonstrate that torsional hysteresis is a relatively load independent measure of global diastolic function
To demonstrate that torsional hysteresis is a relatively load independent measure of global diastolic function by evaluating effects of nitroglycerin (NTG) on torsional hysteresis and correlating it to invasive hemodynamic measure of diastolic function including a) tau and b) EDPVR.
Measured: one time at enrollment
To evaluate the sensitivity and specificity of torsional hysteresis in diagnosing diastolic dysfunction
To evaluate the sensitivity and specificity of torsional hysteresis in diagnosing diastolic dysfunction (as defined by invasive hemodynamic parameters: tau, EDPVR) and compare it to echocardiographic tissue Doppler assessment in patients undergoing cardiac catheterization for suspected diastolic dysfunction
Measured: one time at enrollment
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Sep 2011 (estimated)
- Study startAug 2011
- Primary completionJun 2015
- Study completionJun 2015
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Heart FailureStudies of the same condition, open and under way.
- More trials run by University of Alabama at BirminghamThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case only
- Time perspective
- Prospective
- Enrolment
- 45 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Alabama at Birmingham
- Sponsor type
- University, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01431027
- Sponsor's protocol ID
- F101215002
- Other IDs
- 5R01HL104018
- Status last verified
- Aug 2015
- First submitted
- 3 Aug 2011
- Last updated
- 18 Aug 2015
- Results posted
- No
- Data monitoring committee
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 18 Aug 2015. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Left Ventricular Torsional Hysteresis: A Global Parameter for Diastolic Function
- ClinicalTrials.gov ID
- NCT01431027
- Acronym / sponsor ID
- F101215002
- Keywords
- Heart Failure, Diastolic Heart Failure, Heart Failure with Normal Ejection Fraction
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 45 participants (actual)
- Lead sponsor
- University of Alabama at BirminghamUniversity, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Study start
- Aug 2011
- Primary completion
- Jun 2015 (actual)
- Study completion
- Jun 2015 (actual)
- First posted
- 9 Sep 2011 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Diastolic dysfunction refers to abnormal mechanical properties of the myocardium and includes abnormal LV diastolic distensibility, impaired filling and slow or delayed relaxation- regardless of whether the ejection fraction is normal or depressed and whether the patient is asymptomatic or symptomatic. Epidemiologic studies have demonstrated high prevalence of diastolic heart failure (DHF). The quality of life of these patients is impaired and the clinical outcomes are similar to those with heart failure with systolic dysfunction. Therefore diastolic dysfunction has significant adverse economic impact that is expected to grow further with time. Clinical characteristics alone may not be sufficient to diagnose diastolic dysfunction. A number of invasive and non-invasive parameters have been proposed to diagnose diastolic dysfunction. Most of the presently used non-invasive parameters have a number of limitations. High fidelity measurement of the left ventricular pressures is needed to accurately diagnose diastolic dysfunction. Obtaining it in routine clinical practice is impractical.
In this protocol the investigators have proposed a novel non-invasive parameter called 'Torsional Hysteresis' as a measure of diastolic function. This will be measured using non-invasive cardiac MRI technique. During left ventricular contraction and relaxation, myocardium deforms. During cardiac cycle the myocardium goes back to baseline state prior to beginning of each contraction. However the rate with which it returns to the baseline state is variable. Torsion indicates relative wringing motion of the ventricle around a left ventricular axis and is a global parameter of left ventricular deformation. The parameters have defined a new parameter called torsional hysteresis based on non invasive cardiac MRI assessment. The parameters have hypothesized that for diastolic dysfunction, the torsional hysteresis area is increased as compared to no diastolic dysfunction group.
Study design
- Observational model
- Case only
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Diastolic Function | – | –Patients scheduled for cardiac catheterization. |
Who may qualify
- Ages
- 19 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Patients scheduled for cardiac catheterization.
Key inclusion criteria (1 listed)
- Major inclusion criteria: Normal screening LV ejection fraction.
Key exclusion criteria (5 listed)
- Atrial fibrillation or other significant cardiac arrhythmia on ECG
- Presence of pacemaker or defibrillator
- Angioplasty or primary coronary intervention PCI/PTCA during index cardiac catheterization.
- Patient is unable to undergo cardiac MRI due to contraindication to MRI (MRI incompatible metal prosthesis or implants or significant claustrophobia).
- Patient taking phosphodiesterase 5 inhibitor (eg. sildenafil) will be excluded due to potential interaction with nitroglycerin.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
To show that torsional hysteresis relates to invasive hemodynamic measure of diastolic function
Time frame: one time at enrollment
To show that torsional hysteresis relates to invasive hemodynamic measure of diastolic function: a) Exponential fall of pressure during isovolumic relaxation phase by the time constant of relaxation, tau and b) LV end diastolic pressure-volume relationship (EDPVR).
2 secondary outcomes
To demonstrate that torsional hysteresis is a relatively load independent measure of global diastolic function
Time frame: one time at enrollment
To evaluate the sensitivity and specificity of torsional hysteresis in diagnosing diastolic dysfunction
Time frame: one time at enrollment
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 18 Aug 2015.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Heart Failure and Diastolic Heart Failure, run by University of Alabama at Birmingham at 2 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 18 Aug 2015. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
To show that torsional hysteresis relates to invasive hemodynamic measure of diastolic function (time frame: one time at enrollment). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 18 Aug 2015.