Cardiac TTR AmyloidosisNCT03098901
Radioisotope Scintigraphy to Establish Incidence of Cardiac Amyloidosis Among Patients With Otherwise Unexplained Cardiac Disease
A study testing Tc99m-labeled pyrophosphate scan in people with Cardiac TTR Amyloidosis, run by Kaplan Medical Center.
Trial summary
Cardiac amyloidosis is a multi-organ syndrome, which usually presents as restrictive cardiomyopathy (RCM). Transthyretin (TTR) amyloidosis (or ATTR) is a subtype of amyloidosis which frequently involves heart. Read more about this study
- Who is it for?
- Ages 18 to 85 years
- Conditions the study is for
- Cardiac TTR Amyloidosis
- What is being tested?
- Tc99m-labeled pyrophosphate scan
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 100 participants
- Where
- No sites listed yet
- Study dates
- 15 Apr 2017to 15 Apr 2018
- Phase
- Interventional
- 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 18 to 85 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Heart Failure with Preserved Ejection Fraction not explained by either hypertension or any other clinical condition.
- Systolic dysfunction and non-significant coronary artery disease.
- Diabetic cardiomyopathy
- Otherwise unexplained left ventricular hypertrophy (LVH).
- Under age of 65 and idiopathic ventricular fibrillation (VF) or multiple ventricular premature beats (VPB) or ventricular tachycardia (VT) with a structurally normal heart.
- Under age of 65, and unexplained sinus node disease, sinoatrial block, complete or high-degree atrio-ventricular block or significant intraventricular conduction defect, with structurally normal heart whether having or not having received permanent implanted pacemaker.
Who cannot join
- Primary amyloidosis cannot be excluded,
- Acute or recent (3 months) myocardial infarction,
- Acute or recent (12 months) myocarditis,
- Oncologic or any other co-morbidity, which can shorten the patient's survival to less than one year,
- End stage renal disease treated with dialysis,
- Ischemic cardiomyopathy,
Show all 9Show fewer
- Non-TTR amyloidosis known or suspected,
- Another type of cardiomyopathy (for ex. arrhythmogenic right ventricular dysplasia),
- Any disease or clinical condition that can lead to cardiomyopathy (history of anthracyclines treatment, history of alcohol abuse, multiple myeloma, sarcoidosis, carcinoid, inflammatory and autoimmune diseases).
About this study
Official title: Tc99m-PYP Scintigraphy in Order to Establish Incidence of Cardiac Transthyretin Amyloidosis Among Patients With Otherwise Unexplained Cardiomyopathies
Cardiac amyloidosis is a multi-organ syndrome, which usually presents as restrictive cardiomyopathy (RCM). Transthyretin (TTR) amyloidosis (or ATTR) is a subtype of amyloidosis which frequently involves heart. Cardiac ATTR, though infrequently diagnosed during lifetime, may represent a prevalent cause of RCM, especially in elderly. Several medications that can limit progression of the disease are currently under investigation. Presently the golden standard for diagnosis of ATTR is endomyocardial biopsy (EMB) which may entail severe adverse complications causing under-diagnosis of ATTR.
Several papers support the evidence that Tc99m-labeled tracers can be used to detect myocardial deposits of TTR amyloid. It was suggested that Tc99m scintigraphy might be a highly sensitive diagnostic tool for cardiac ATTR. In this study the patients with otherwise unexplained cardiomyopathy or heart block will undergo Tc99m scan, which will establish the incidence of this largely underdiagnosed condition in the population.
Read the detailed description
Amyloidosis is a multi-organ syndrome, which usually presents as a restrictive cardiomyopathy (RCM). Transthyretin (TTR) amyloidosis is a subtype of amyloidosis, further subdivided into familial type and senile type. Its pathophysiology consists primarily of abnormal precipitation of transthyretin - a protein that normally acts as transporter for thyroid hormone and retinoids - in tissues. TTR amyloidosis frequently involves heart, bringing about the same clinical and pathophysiological picture of RCM. Another presentation of TTR Amyloidosis can be atrio-ventricular block or bundle-branch block [1].
There is evidence that the cardiac TTR amyloidosis, though infrequently diagnosed during the lifetime, may represent a widespread cause of restrictive cardiomyopathy especially in elderly. An autopsy study in octogenarians having suffered of heart failure with preserved left ventricular ejection fraction (HFpEF) suggested that up to 25% of them had TTR amyloid deposit in myocardium, though a negligible minority of them had been diagnosed with TTR amyloidosis during their lifetime [2-3]. HFpEF is a very widespread diagnosis, which represents a considerable burden of morbidity, and usually harbours populations of patients poorly responding to treatment. Most of patients with the diagnosis of HFpEF have little or no explanation concerning the aetiology of their disease, especially if they do not respond to conventional treatment. Most of them can benefit only from symptomatic treatment which does not alter the course of the disease. Thus a more widespread diagnosis of TTR amyloidosis could have been very promising as to a better management of this hard-to-treat patient population.
Several medications that can limit progression of TTR amyloidosis are currently under investigation. Until now, the golden standard for diagnosis of the disease was endomyocardial biopsy (EMB) which may entail several adverse complications and thus limit widespread diagnosis. Since amyloidosis is a multi-organ disease, extra-cardiac biopsy was proposed as a surrogate tissue diagnosis, though in TTR amyloidosis its sensitivity is below 50% [4].
Recently several papers support the evidence that Tc99m-labeled pyrophosphate (PYP) and bisphosphonates when injected intravenously localize to myocardial deposits of TTR amyloid. It was thus suggested that Tc99m scintigraphy might be a highly sensitive and specific diagnostic tool for cardiac TTR amyloidosis [5-9]. It was shown that almost the only source of false positive Tc99m scintigraphy is primary amyloidosis, which is a different entity, with worse prognosis, different treatment, although frequently involves heart as well [10]. Primary amyloidosis can be diagnosed by means of demonstration of monoclonal immunoglobulin peak in serum and immunoglobulin light chains in serum and urine [11]. Therefore, the specificity of Tc99m scan for TTR amyloidosis can be brought to an extraordinary level, with virtually negligible false positive rate, if primary amyloidosis is excluded prior to referral to Tc99m scan. The other entity where false positive uptake of Tc99m in myocardium can be observed is acute myocardial infarction. Currently the Tc99m-PYP scan is utilised as bone scan according to guidelines in order to diagnose wide spectrum of diseases such as stress fractures or metastatic bone disease.
At present the mentioned hypothesis that TTR amyloidosis might be a widespread cause of HFpEF has not been established in a clinical trial due to the fact that until now the most accurate diagnosis of TTR amyloidosis required an invasive procedure with possible adverse outcomes while the extra-cardiac biopsy had low diagnostic yield. Advent of a novel, possibly as accurate, yet non-invasive diagnostic tool opens new opportunities to set such study.
The incidence of both familial type and senile type TTR amyloidosis among patients with diagnosis of otherwise unexplained heart failure or heart block will be evaluated in this study by means of Tc99m scan using SPECT technology as described above. The hypothesis is that if the incidence of TTR amyloidosis within the population of patients suffering of HFpEF is as high as it was demonstrated by the autopsy studies, then we will be able to establish the diagnosis in a larger cohort of patients. This will make new developments in the research of the disease, such as treatment and outcome driven trials, possible.
Establishing the diagnosis of TTR amyloidosis in patients with HFpEF will improve our decision-making ability regarding the patients' treatment, for example preventing unnecessary invasive measures in patients with comorbidities demanding such measures, the alternative diagnoses being unrevealed.
- Conditions
- Cardiac TTR Amyloidosis
- Being tested
- Tc99m-labeled pyrophosphate scan
- Keywords
- TTR Amyloidosis, Heart Failure with Preserved Ejection Fraction, Ventricular arrhythmia, Cardiac Conduction Disturbances
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Tc99m-labeled pyrophosphate scanDiagnostic test
Intravenous injection of Tc99m-labeled pyrophosphate with consecutive whole body scan using gamma ray scanner for assessment of radioactive uptake in the heart. The results of the scan will be evaluated by a specialist in the field. The uptake will be graded using Perugini scale (0- no uptake, 1- uptake in heart less intense than in bones, 2-uptake in heart as intense as in bones, 3-uptake in heart more intense than in bones).
| Study group | Role | What they receive |
|---|---|---|
| no other arm | Other | Not described Receives: Diagnostic Test: Tc99m-labeled pyrophosphate scan |
What is being measured
The primary outcome is the main question the study is designed to answer.
diagnosis or exclusion of any type of cardiac amyloidosis;
diagnosis of cardiac TTR amyloidosis, or any other type of cardiac amyloidosis, or diagnosis of another condition other than amyloidosis explaining the patient's clinical cardiological findings
Measured: immediately at the Tc99m scan performing or within a year form beginning of the recruitment
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Apr 2017
- Study start15 Apr 2017 (estimated)
- Primary completion15 Apr 2018 (estimated)
- Study completion15 Apr 2018 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (9)Papers the sponsor has linked to this study.
- Other trials for Cardiac TTR AmyloidosisStudies of the same condition, open and under way.
- 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- Patients that suffer of one of the following conditions will be included in the study 1. Patients suffering of HFpEF not explained by either hypertension or any other clinical condition. 2. Patients with systolic dysfunction and non-significant coronary artery disease. 3. Patients with diabetic cardiomyopathy 4. Patients with otherwise unexplained left ventricular hypertrophy (LVH). 5. Patients under age of 65 with idiopathic ventricular fibrillation (VF) or multiple ventricular premature beats (VPB) or ventricular tachycardia (VT) with a structurally normal heart. 6. Patients under age of 65, with unexplained sinus node disease, sinoatrial block, complete or high-degree atrio-ventricular block or significant intraventricular conduction defect, with structurally normal heart whether having or not having received permanent implanted pacemaker.
- Masking
- None (open label)
- Enrolment
- 100 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Kaplan Medical Center
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Sara Shimoni, Kaplan Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03098901
- Sponsor's protocol ID
- KMC-0018-17
- Status last verified
- Apr 2017
- First submitted
- 28 Mar 2017
- Last updated
- 5 Apr 2017
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Ruberg FL, Berk JL. Transthyretin (TTR) cardiac amyloidosis. Circulation. 2012 Sep 4;126(10):1286-300. doi: 10.1161/CIRCULATIONAHA.111.078915. No abstract available.
PubMed 22949539Tanskanen M, Peuralinna T, Polvikoski T, Notkola IL, Sulkava R, Hardy J, Singleton A, Kiuru-Enari S, Paetau A, Tienari PJ, Myllykangas L. Senile systemic amyloidosis affects 25% of the very aged and associates with genetic variation in alpha2-macroglobulin and tau: a population-based autopsy study. Ann Med. 2008;40(3):232-9. doi: 10.1080/07853890701842988.
PubMed 18382889Fine NM, Arruda-Olson AM, Dispenzieri A, Zeldenrust SR, Gertz MA, Kyle RA, Swiecicki PL, Scott CG, Grogan M. Yield of noncardiac biopsy for the diagnosis of transthyretin cardiac amyloidosis. Am J Cardiol. 2014 May 15;113(10):1723-7. doi: 10.1016/j.amjcard.2014.02.030. Epub 2014 Mar 2.
PubMed 24698461Maurer MS. Noninvasive Identification of ATTRwt Cardiac Amyloid: The Re-emergence of Nuclear Cardiology. Am J Med. 2015 Dec;128(12):1275-80. doi: 10.1016/j.amjmed.2015.05.039. Epub 2015 Jun 17.
PubMed 26091765Perugini E, Guidalotti PL, Salvi F, Cooke RM, Pettinato C, Riva L, Leone O, Farsad M, Ciliberti P, Bacchi-Reggiani L, Fallani F, Branzi A, Rapezzi C. Noninvasive etiologic diagnosis of cardiac amyloidosis using 99mTc-3,3-diphosphono-1,2-propanodicarboxylic acid scintigraphy. J Am Coll Cardiol. 2005 Sep 20;46(6):1076-84. doi: 10.1016/j.jacc.2005.05.073.
PubMed 16168294Rapezzi C, Quarta CC, Guidalotti PL, Longhi S, Pettinato C, Leone O, Ferlini A, Salvi F, Gallo P, Gagliardi C, Branzi A. Usefulness and limitations of 99mTc-3,3-diphosphono-1,2-propanodicarboxylic acid scintigraphy in the aetiological diagnosis of amyloidotic cardiomyopathy. Eur J Nucl Med Mol Imaging. 2011 Mar;38(3):470-8. doi: 10.1007/s00259-010-1642-7. Epub 2010 Nov 11.
PubMed 21069320Bokhari S, Castano A, Pozniakoff T, Deslisle S, Latif F, Maurer MS. (99m)Tc-pyrophosphate scintigraphy for differentiating light-chain cardiac amyloidosis from the transthyretin-related familial and senile cardiac amyloidoses. Circ Cardiovasc Imaging. 2013 Mar 1;6(2):195-201. doi: 10.1161/CIRCIMAGING.112.000132. Epub 2013 Feb 11.
PubMed 23400849Gillmore JD, Maurer MS, Falk RH, Merlini G, Damy T, Dispenzieri A, Wechalekar AD, Berk JL, Quarta CC, Grogan M, Lachmann HJ, Bokhari S, Castano A, Dorbala S, Johnson GB, Glaudemans AW, Rezk T, Fontana M, Palladini G, Milani P, Guidalotti PL, Flatman K, Lane T, Vonberg FW, Whelan CJ, Moon JC, Ruberg FL, Miller EJ, Hutt DF, Hazenberg BP, Rapezzi C, Hawkins PN. Nonbiopsy Diagnosis of Cardiac Transthyretin Amyloidosis. Circulation. 2016 Jun 14;133(24):2404-12. doi: 10.1161/CIRCULATIONAHA.116.021612. Epub 2016 Apr 22.
PubMed 27143678Kyle RA, Gertz MA. Primary systemic amyloidosis: clinical and laboratory features in 474 cases. Semin Hematol. 1995 Jan;32(1):45-59. No abstract available.
PubMed 7878478
Study at a glance
From the registry record, last updated by the sponsor on 5 Apr 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Tc99m-PYP Scintigraphy in Order to Establish Incidence of Cardiac Transthyretin Amyloidosis Among Patients With Otherwise Unexplained Cardiomyopathies
- ClinicalTrials.gov ID
- NCT03098901
- Acronym / sponsor ID
- KMC-0018-17
- Conditions
- Cardiac TTR Amyloidosis
- Keywords
- TTR Amyloidosis, Heart Failure with Preserved Ejection Fraction, Ventricular arrhythmia, Cardiac Conduction Disturbances
- Study type
- Interventional
- Recruitment status
- Unknown status
- Enrolment
- 100 participants (estimated)
- Lead sponsor
- Kaplan Medical CenterUniversity, hospital or other
- Study start
- 15 Apr 2017 (estimated)
- Primary completion
- 15 Apr 2018 (estimated)
- Study completion
- 15 Apr 2018 (estimated)
- First posted
- 4 Apr 2017 (actual)
- 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.
Cardiac amyloidosis is a multi-organ syndrome, which usually presents as restrictive cardiomyopathy (RCM). Transthyretin (TTR) amyloidosis (or ATTR) is a subtype of amyloidosis which frequently involves heart. Cardiac ATTR, though infrequently diagnosed during lifetime, may represent a prevalent cause of RCM, especially in elderly. Several medications that can limit progression of the disease are currently under investigation. Presently the golden standard for diagnosis of ATTR is endomyocardial biopsy (EMB) which may entail severe adverse complications causing under-diagnosis of ATTR.
Several papers support the evidence that Tc99m-labeled tracers can be used to detect myocardial deposits of TTR amyloid. It was suggested that Tc99m scintigraphy might be a highly sensitive diagnostic tool for cardiac ATTR. In this study the patients with otherwise unexplained cardiomyopathy or heart block will undergo Tc99m scan, which will establish the incidence of this largely underdiagnosed condition in the population.
Detailed description
Amyloidosis is a multi-organ syndrome, which usually presents as a restrictive cardiomyopathy (RCM). Transthyretin (TTR) amyloidosis is a subtype of amyloidosis, further subdivided into familial type and senile type. Its pathophysiology consists primarily of abnormal precipitation of transthyretin - a protein that normally acts as transporter for thyroid hormone and retinoids - in tissues. TTR amyloidosis frequently involves heart, bringing about the same clinical and pathophysiological picture of RCM. Another presentation of TTR Amyloidosis can be atrio-ventricular block or bundle-branch block [1].
There is evidence that the cardiac TTR amyloidosis, though infrequently diagnosed during the lifetime, may represent a widespread cause of restrictive cardiomyopathy especially in elderly. An autopsy study in octogenarians having suffered of heart failure with preserved left ventricular ejection fraction (HFpEF) suggested that up to 25% of them had TTR amyloid deposit in myocardium, though a negligible minority of them had been diagnosed with TTR amyloidosis during their lifetime [2-3]. HFpEF is a very widespread diagnosis, which represents a considerable burden of morbidity, and usually harbours populations of patients poorly responding to treatment. Most of patients with the diagnosis of HFpEF have little or no explanation concerning the aetiology of their disease, especially if they do not respond to conventional treatment. Most of them can benefit only from symptomatic treatment which does not alter the course of the disease. Thus a more widespread diagnosis of TTR amyloidosis could have been very promising as to a better management of this hard-to-treat patient population.
Several medications that can limit progression of TTR amyloidosis are currently under investigation. Until now, the golden standard for diagnosis of the disease was endomyocardial biopsy (EMB) which may entail several adverse complications and thus limit widespread diagnosis. Since amyloidosis is a multi-organ disease, extra-cardiac biopsy was proposed as a surrogate tissue diagnosis, though in TTR amyloidosis its sensitivity is below 50% [4].
Recently several papers support the evidence that Tc99m-labeled pyrophosphate (PYP) and bisphosphonates when injected intravenously localize to myocardial deposits of TTR amyloid. It was thus suggested that Tc99m scintigraphy might be a highly sensitive and specific diagnostic tool for cardiac TTR amyloidosis [5-9]. It was shown that almost the only source of false positive Tc99m scintigraphy is primary amyloidosis, which is a different entity, with worse prognosis, different treatment, although frequently involves heart as well [10]. Primary amyloidosis can be diagnosed by means of demonstration of monoclonal immunoglobulin peak in serum and immunoglobulin light chains in serum and urine [11]. Therefore, the specificity of Tc99m scan for TTR amyloidosis can be brought to an extraordinary level, with virtually negligible false positive rate, if primary amyloidosis is excluded prior to referral to Tc99m scan. The other entity where false positive uptake of Tc99m in myocardium can be observed is acute myocardial infarction. Currently the Tc99m-PYP scan is utilised as bone scan according to guidelines in order to diagnose wide spectrum of diseases such as stress fractures or metastatic bone disease.
At present the mentioned hypothesis that TTR amyloidosis might be a widespread cause of HFpEF has not been established in a clinical trial due to the fact that until now the most accurate diagnosis of TTR amyloidosis required an invasive procedure with possible adverse outcomes while the extra-cardiac biopsy had low diagnostic yield. Advent of a novel, possibly as accurate, yet non-invasive diagnostic tool opens new opportunities to set such study.
The incidence of both familial type and senile type TTR amyloidosis among patients with diagnosis of otherwise unexplained heart failure or heart block will be evaluated in this study by means of Tc99m scan using SPECT technology as described above. The hypothesis is that if the incidence of TTR amyloidosis within the population of patients suffering of HFpEF is as high as it was demonstrated by the autopsy studies, then we will be able to establish the diagnosis in a larger cohort of patients. This will make new developments in the research of the disease, such as treatment and outcome driven trials, possible.
Establishing the diagnosis of TTR amyloidosis in patients with HFpEF will improve our decision-making ability regarding the patients' treatment, for example preventing unnecessary invasive measures in patients with comorbidities demanding such measures, the alternative diagnoses being unrevealed.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- Patients that suffer of one of the following conditions will be included in the study 1. Patients suffering of HFpEF not explained by either hypertension or any other clinical condition. 2. Patients with systolic dysfunction and non-significant coronary artery disease. 3. Patients with diabetic cardiomyopathy 4. Patients with otherwise unexplained left ventricular hypertrophy (LVH). 5. Patients under age of 65 with idiopathic ventricular fibrillation (VF) or multiple ventricular premature beats (VPB) or ventricular tachycardia (VT) with a structurally normal heart. 6. Patients under age of 65, with unexplained sinus node disease, sinoatrial block, complete or high-degree atrio-ventricular block or significant intraventricular conduction defect, with structurally normal heart whether having or not having received permanent implanted pacemaker.
| Arm | Type | Receives |
|---|---|---|
| no other arm | Other | Diagnostic Test: Tc99m-labeled pyrophosphate scan |
Who may qualify
- Ages
- 18 to 85 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Heart Failure with Preserved Ejection Fraction not explained by either hypertension or any other clinical condition.
- Systolic dysfunction and non-significant coronary artery disease.
- Diabetic cardiomyopathy
- Otherwise unexplained left ventricular hypertrophy (LVH).
- Under age of 65 and idiopathic ventricular fibrillation (VF) or multiple ventricular premature beats (VPB) or ventricular tachycardia (VT) with a structurally normal heart.
Key exclusion criteria (9 listed)
- Primary amyloidosis cannot be excluded,
- Acute or recent (3 months) myocardial infarction,
- Acute or recent (12 months) myocarditis,
- Oncologic or any other co-morbidity, which can shorten the patient's survival to less than one year,
- End stage renal disease treated with dialysis,
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Tc99m-labeled pyrophosphate scanIntravenous injection of Tc99m-labeled pyrophosphate with consecutive whole body scan using gamma ray scanner for assessment of radioactive uptake in the heart. The results of the scan will be evaluated by a specialist in the field. The uptake will be graded using Perugini scale (0- no uptake, 1- uptake in heart less intense than in bones, 2-uptake in heart as intense as in bones, 3-uptake in heart more intense than in bones). | Diagnostic test | no other arm |
Primary outcome
diagnosis or exclusion of any type of cardiac amyloidosis;
Time frame: immediately at the Tc99m scan performing or within a year form beginning of the recruitment
diagnosis of cardiac TTR amyloidosis, or any other type of cardiac amyloidosis, or diagnosis of another condition other than amyloidosis explaining the patient's clinical cardiological findings
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 5 Apr 2017.
- Background: PubMed 22949539Ruberg FL, Berk JL. Transthyretin (TTR) cardiac amyloidosis. Circulation. 2012 Sep 4;126(10):1286-300. doi: 10.1161/CIRCULATIONAHA.111.078915. No abstract available.
- Background: PubMed 18382889Tanskanen M, Peuralinna T, Polvikoski T, Notkola IL, Sulkava R, Hardy J, Singleton A, Kiuru-Enari S, Paetau A, Tienari PJ, Myllykangas L. Senile systemic amyloidosis affects 25% of the very aged and associates with genetic variation in alpha2-macroglobulin and tau: a population-based autopsy study. Ann Med. 2008;40(3):232-9. doi: 10.1080/07853890701842988.
- Background: PubMed 24698461Fine NM, Arruda-Olson AM, Dispenzieri A, Zeldenrust SR, Gertz MA, Kyle RA, Swiecicki PL, Scott CG, Grogan M. Yield of noncardiac biopsy for the diagnosis of transthyretin cardiac amyloidosis. Am J Cardiol. 2014 May 15;113(10):1723-7. doi: 10.1016/j.amjcard.2014.02.030. Epub 2014 Mar 2.
- Background: PubMed 26091765Maurer MS. Noninvasive Identification of ATTRwt Cardiac Amyloid: The Re-emergence of Nuclear Cardiology. Am J Med. 2015 Dec;128(12):1275-80. doi: 10.1016/j.amjmed.2015.05.039. Epub 2015 Jun 17.
- Background: PubMed 16168294Perugini E, Guidalotti PL, Salvi F, Cooke RM, Pettinato C, Riva L, Leone O, Farsad M, Ciliberti P, Bacchi-Reggiani L, Fallani F, Branzi A, Rapezzi C. Noninvasive etiologic diagnosis of cardiac amyloidosis using 99mTc-3,3-diphosphono-1,2-propanodicarboxylic acid scintigraphy. J Am Coll Cardiol. 2005 Sep 20;46(6):1076-84. doi: 10.1016/j.jacc.2005.05.073.
- Background: PubMed 21069320Rapezzi C, Quarta CC, Guidalotti PL, Longhi S, Pettinato C, Leone O, Ferlini A, Salvi F, Gallo P, Gagliardi C, Branzi A. Usefulness and limitations of 99mTc-3,3-diphosphono-1,2-propanodicarboxylic acid scintigraphy in the aetiological diagnosis of amyloidotic cardiomyopathy. Eur J Nucl Med Mol Imaging. 2011 Mar;38(3):470-8. doi: 10.1007/s00259-010-1642-7. Epub 2010 Nov 11.
- Background: PubMed 23400849Bokhari S, Castano A, Pozniakoff T, Deslisle S, Latif F, Maurer MS. (99m)Tc-pyrophosphate scintigraphy for differentiating light-chain cardiac amyloidosis from the transthyretin-related familial and senile cardiac amyloidoses. Circ Cardiovasc Imaging. 2013 Mar 1;6(2):195-201. doi: 10.1161/CIRCIMAGING.112.000132. Epub 2013 Feb 11.
- Background: PubMed 27143678Gillmore JD, Maurer MS, Falk RH, Merlini G, Damy T, Dispenzieri A, Wechalekar AD, Berk JL, Quarta CC, Grogan M, Lachmann HJ, Bokhari S, Castano A, Dorbala S, Johnson GB, Glaudemans AW, Rezk T, Fontana M, Palladini G, Milani P, Guidalotti PL, Flatman K, Lane T, Vonberg FW, Whelan CJ, Moon JC, Ruberg FL, Miller EJ, Hutt DF, Hazenberg BP, Rapezzi C, Hawkins PN. Nonbiopsy Diagnosis of Cardiac Transthyretin Amyloidosis. Circulation. 2016 Jun 14;133(24):2404-12. doi: 10.1161/CIRCULATIONAHA.116.021612. Epub 2016 Apr 22.
- Background: PubMed 7878478Kyle RA, Gertz MA. Primary systemic amyloidosis: clinical and laboratory features in 474 cases. Semin Hematol. 1995 Jan;32(1):45-59. No abstract available.
- Individual participant dataSharing planned: No
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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.
Questions about this trial
What is this clinical trial studying?
A study testing Tc99m-labeled pyrophosphate scan in people with Cardiac TTR Amyloidosis, run by Kaplan Medical Center.
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 6 inclusion and 9 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: status not confirmed, as of the sponsor's last update on 5 Apr 2017. Status can change between updates, so confirm with the study contact before making plans.
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?
Results are not available in the source record.
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?
diagnosis or exclusion of any type of cardiac amyloidosis; (time frame: immediately at the Tc99m scan performing or within a year form beginning of the recruitment). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT03098901, which also lists 9 linked publications.
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 5 Apr 2017.